diff --git a/admin-web/src/api/channel.ts b/admin-web/src/api/channel.ts
index 066edf2..36f357e 100644
--- a/admin-web/src/api/channel.ts
+++ b/admin-web/src/api/channel.ts
@@ -2,6 +2,10 @@ import client from './client'
 export * from './channelSubject'
 export * from './channelAccount'
 
+export interface ChannelIdentityQuery {
+  keyword?: string
+}
+
 export function createConversation(data: any) {
   return client.post('/api/v1/conversation', data)
 }
@@ -25,3 +29,15 @@ export function bindConversationAccount(conversationId: number, data: any) {
 export function bindConversationTags(conversationId: number, data: any) {
   return client.post(`/api/v1/conversation/${conversationId}/bind-tags`, data)
 }
+
+export function listChannelIdentities(params?: ChannelIdentityQuery) {
+  return client.get('/api/v1/channel-identity/list', { params })
+}
+
+export function listConversationParticipants(conversationId: number) {
+  return client.get(`/api/v1/conversation/${conversationId}/participants`)
+}
+
+export function listConversationTags(conversationId: number) {
+  return client.get(`/api/v1/conversation/${conversationId}/tags`)
+}
diff --git a/admin-web/src/components/Layout.vue b/admin-web/src/components/Layout.vue
index 9ae9152..8d2aa0a 100644
--- a/admin-web/src/components/Layout.vue
+++ b/admin-web/src/components/Layout.vue
@@ -27,6 +27,7 @@
           <el-menu-item index="/channel/subject">渠道主体</el-menu-item>
           <el-menu-item index="/channel/app">渠道应用</el-menu-item>
           <el-menu-item index="/channel/account">渠道账号</el-menu-item>
+          <el-menu-item index="/channel/identity">渠道身份</el-menu-item>
         </el-sub-menu>
 
         <el-sub-menu index="/customer">
diff --git a/admin-web/src/router/index.ts b/admin-web/src/router/index.ts
index 528791c..2d72397 100644
--- a/admin-web/src/router/index.ts
+++ b/admin-web/src/router/index.ts
@@ -4,6 +4,7 @@ import Dashboard from '../views/Dashboard.vue'
 import ChannelSubject from '../views/ChannelSubject.vue'
 import ChannelApp from '../views/ChannelApp.vue'
 import ChannelAccount from '../views/ChannelAccount.vue'
+import ChannelIdentity from '../views/ChannelIdentity.vue'
 import Person from '../views/Person.vue'
 import Conversation from '../views/Conversation.vue'
 import Tag from '../views/Tag.vue'
@@ -30,6 +31,7 @@ const routes = [
       { path: 'channel/subject', component: ChannelSubject, meta: { title: '渠道主体' } },
       { path: 'channel/app', component: ChannelApp, meta: { title: '渠道应用' } },
       { path: 'channel/account', component: ChannelAccount, meta: { title: '渠道账号' } },
+      { path: 'channel/identity', component: ChannelIdentity, meta: { title: '渠道身份' } },
       { path: 'customer/person', component: Person, meta: { title: '联系人' } },
       { path: 'customer/group', component: Conversation, meta: { title: '群聊' } },
       { path: 'customer/tag', component: Tag, meta: { title: '标签体系' } },
diff --git a/admin-web/src/views/ChannelIdentity.vue b/admin-web/src/views/ChannelIdentity.vue
new file mode 100644
index 0000000..7b42345
--- /dev/null
+++ b/admin-web/src/views/ChannelIdentity.vue
@@ -0,0 +1,112 @@
+<template>
+  <PageCard>
+    <template #toolbar-left>
+      <el-input
+        v-model="searchKeyword"
+        placeholder="搜索渠道用户ID / 渠道用户名 / 联系人姓名"
+        clearable
+        style="width: 320px"
+      >
+        <template #prefix>
+          <el-icon><Search /></el-icon>
+        </template>
+      </el-input>
+    </template>
+
+    <el-table :data="pagedIdentities" class="sino-table">
+      <el-table-column prop="id" label="ID" width="80" />
+      <el-table-column prop="channelType" label="渠道类型" width="110">
+        <template #default="{ row }">
+          {{ channelLabel(row.channelType) }}
+        </template>
+      </el-table-column>
+      <el-table-column prop="channelUserId" label="渠道用户ID" show-overflow-tooltip />
+      <el-table-column prop="channelUserName" label="渠道用户名" show-overflow-tooltip />
+      <el-table-column prop="subjectName" label="所属主体" show-overflow-tooltip />
+      <el-table-column prop="personName" label="关联联系人" show-overflow-tooltip />
+      <el-table-column prop="personType" label="人员类型" width="110">
+        <template #default="{ row }">
+          {{ formatPersonType(row.personType) }}
+        </template>
+      </el-table-column>
+      <el-table-column prop="status" label="状态" width="120">
+        <template #default="{ row }">
+          <el-tag :type="row.status === 1 ? 'success' : 'info'" size="small">
+            {{ row.status === 1 ? '启用' : '禁用' }}
+          </el-tag>
+        </template>
+      </el-table-column>
+    </el-table>
+
+    <template #pagination>
+      <el-pagination
+        v-model:current-page="currentPage"
+        v-model:page-size="pageSize"
+        :total="filteredIdentities.length"
+        :page-sizes="[10, 20, 50]"
+        layout="total, sizes, prev, pager, next"
+        background
+      />
+    </template>
+  </PageCard>
+</template>
+
+<script setup lang="ts">
+import { computed, onMounted, ref, watch } from 'vue'
+import { Search } from '@element-plus/icons-vue'
+import { ElMessage } from 'element-plus'
+import { listChannelIdentities } from '@/api/channel'
+import PageCard from '@/components/PageCard.vue'
+
+const identities = ref<any[]>([])
+const searchKeyword = ref('')
+const currentPage = ref(1)
+const pageSize = ref(10)
+
+const filteredIdentities = computed(() => {
+  const kw = searchKeyword.value.trim().toLowerCase()
+  if (!kw) return identities.value
+  return identities.value.filter((item) =>
+    [item.channelUserId, item.channelUserName, item.personName].some((v) =>
+      String(v || '').toLowerCase().includes(kw)
+    )
+  )
+})
+
+const pagedIdentities = computed(() => {
+  const start = (currentPage.value - 1) * pageSize.value
+  return filteredIdentities.value.slice(start, start + pageSize.value)
+})
+
+watch([searchKeyword], () => {
+  currentPage.value = 1
+})
+
+function channelLabel(type: string | undefined) {
+  const map: Record<string, string> = {
+    wecom: '企微',
+    wechat_personal: '个微',
+    dingtalk: '钉钉',
+    feishu: '飞书',
+    ivr: 'IVR',
+  }
+  return map[type || ''] || type || '-'
+}
+
+function formatPersonType(type: number | undefined) {
+  if (type === 3) return '客户'
+  if (type == null) return '-'
+  return '内部'
+}
+
+async function loadIdentities() {
+  try {
+    const res: any = await listChannelIdentities({ keyword: searchKeyword.value.trim() })
+    identities.value = res.data || []
+  } catch (e: any) {
+    ElMessage.error(e.message)
+  }
+}
+
+onMounted(loadIdentities)
+</script>
diff --git a/admin-web/src/views/Conversation.vue b/admin-web/src/views/Conversation.vue
index b577b3a..bd81609 100644
--- a/admin-web/src/views/Conversation.vue
+++ b/admin-web/src/views/Conversation.vue
@@ -151,6 +151,38 @@
         </div>
       </div>
 
+      <el-divider />
+
+      <div class="detail-section">
+        <div class="section-title">群成员</div>
+        <el-table :data="participants" class="sino-table" size="small" max-height="320">
+          <el-table-column prop="participantType" label="类型" width="90">
+            <template #default="{ row }">
+              {{ formatParticipantType(row.participantType) }}
+            </template>
+          </el-table-column>
+          <el-table-column prop="channelUserId" label="渠道用户ID" show-overflow-tooltip />
+          <el-table-column prop="personName" label="姓名" show-overflow-tooltip />
+          <el-table-column prop="personType" label="人员类型" width="100">
+            <template #default="{ row }">
+              {{ formatParticipantPersonType(row.personType) }}
+            </template>
+          </el-table-column>
+        </el-table>
+      </div>
+
+      <el-divider />
+
+      <div class="detail-section">
+        <div class="section-title">已绑定标签</div>
+        <div v-if="boundTags.length" class="tag-list">
+          <el-tag v-for="t in boundTags" :key="t.id" class="tag-item" size="small">
+            {{ t.tagName }}
+          </el-tag>
+        </div>
+        <el-empty v-else description="暂无标签" :image-size="60" />
+      </div>
+
       <template #footer>
         <el-button @click="drawerVisible = false">取消</el-button>
         <el-button type="danger" @click="handleDelete(currentConversation)">删除</el-button>
@@ -219,6 +251,8 @@ import {
   createConversation,
   deleteConversation,
   listChannelAccounts,
+  listConversationParticipants,
+  listConversationTags,
   listConversations,
   updateConversation,
 } from '@/api/channel'
@@ -248,6 +282,8 @@ const currentPage = ref(1)
 const pageSize = ref(10)
 const drawerVisible = ref(false)
 const currentConversation = ref<any>({})
+const participants = ref<any[]>([])
+const boundTags = ref<any[]>([])
 
 const filteredConversations = computed(() => {
   const q = searchQuery.value.trim().toLowerCase()
@@ -305,6 +341,8 @@ function openDrawer(row: any) {
   editingId.value = row.id
   fillDialogForm(row)
   drawerVisible.value = true
+  loadParticipants(row.id)
+  loadBoundTags(row.id)
 }
 
 const accountMap = computed(() => {
@@ -334,6 +372,45 @@ function formatConversationType(type: number | undefined) {
   return type ?? '-'
 }
 
+function formatParticipantType(type: number | undefined) {
+  if (type === 1) return '群主'
+  return '成员'
+}
+
+function formatParticipantPersonType(type: number | undefined) {
+  if (type === 3) return '客户'
+  if (type == null) return '-'
+  return '内部'
+}
+
+async function loadParticipants(conversationId: number | undefined) {
+  if (!conversationId) {
+    participants.value = []
+    return
+  }
+  try {
+    const res: any = await listConversationParticipants(conversationId)
+    participants.value = res.data || []
+  } catch (e: any) {
+    ElMessage.error(e.message)
+    participants.value = []
+  }
+}
+
+async function loadBoundTags(conversationId: number | undefined) {
+  if (!conversationId) {
+    boundTags.value = []
+    return
+  }
+  try {
+    const res: any = await listConversationTags(conversationId)
+    boundTags.value = res.data || []
+  } catch (e: any) {
+    ElMessage.error(e.message)
+    boundTags.value = []
+  }
+}
+
 async function loadConversations() {
   try {
     const res: any = await listConversations()
@@ -504,4 +581,18 @@ onMounted(() => {
   display: flex;
   gap: 16px;
 }
+
+.detail-section {
+  margin-bottom: 8px;
+}
+
+.tag-list {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.tag-item {
+  margin-right: 0;
+}
 </style>
diff --git a/admin-web/tsconfig.app.tsbuildinfo b/admin-web/tsconfig.app.tsbuildinfo
index 44af9c2..e7a4e7f 100644
--- a/admin-web/tsconfig.app.tsbuildinfo
+++ b/admin-web/tsconfig.app.tsbuildinfo
@@ -1 +1 @@
-{"root":["./src/main.ts","./src/vite-env.d.ts","./src/api/account.ts","./src/api/channel.ts","./src/api/channelaccount.ts","./src/api/channelsubject.ts","./src/api/client.ts","./src/api/crm.ts","./src/api/dashboard.ts","./src/api/flow.ts","./src/api/inbound.ts","./src/api/inboundflow.ts","./src/api/inboundwebhook.ts","./src/api/ivrflow.ts","./src/api/send.ts","./src/api/sendpolicy.ts","./src/api/sendrecord.ts","./src/api/synctask.ts","./src/router/index.ts","./src/stores/auth.ts","./src/app.vue","./src/components/layout.vue","./src/components/pagecard.vue","./src/views/channelaccount.vue","./src/views/channelapp.vue","./src/views/channelsubject.vue","./src/views/conversation.vue","./src/views/dashboard.vue","./src/views/flowtrace.vue","./src/views/inboundflow.vue","./src/views/inboundwebhook.vue","./src/views/ivrflow.vue","./src/views/login.vue","./src/views/messagetest.vue","./src/views/messages.vue","./src/views/person.vue","./src/views/sendpolicy.vue","./src/views/sendrecord.vue","./src/views/tag.vue","./src/views/tenantmanagement.vue","./src/views/usermanagement.vue"],"version":"6.0.3"}
\ No newline at end of file
+{"root":["./src/main.ts","./src/vite-env.d.ts","./src/api/account.ts","./src/api/channel.ts","./src/api/channelaccount.ts","./src/api/channelsubject.ts","./src/api/client.ts","./src/api/crm.ts","./src/api/dashboard.ts","./src/api/flow.ts","./src/api/inbound.ts","./src/api/inboundflow.ts","./src/api/inboundwebhook.ts","./src/api/ivrflow.ts","./src/api/send.ts","./src/api/sendpolicy.ts","./src/api/sendrecord.ts","./src/api/synctask.ts","./src/router/index.ts","./src/stores/auth.ts","./src/app.vue","./src/components/layout.vue","./src/components/pagecard.vue","./src/views/channelaccount.vue","./src/views/channelapp.vue","./src/views/channelidentity.vue","./src/views/channelsubject.vue","./src/views/conversation.vue","./src/views/dashboard.vue","./src/views/flowtrace.vue","./src/views/inboundflow.vue","./src/views/inboundwebhook.vue","./src/views/ivrflow.vue","./src/views/login.vue","./src/views/messagetest.vue","./src/views/messages.vue","./src/views/person.vue","./src/views/sendpolicy.vue","./src/views/sendrecord.vue","./src/views/tag.vue","./src/views/tenantmanagement.vue","./src/views/usermanagement.vue"],"version":"6.0.3"}
\ No newline at end of file
diff --git a/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/RealWeComSyncClient.java b/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/RealWeComSyncClient.java
index 52da478..a681fda 100644
--- a/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/RealWeComSyncClient.java
+++ b/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/RealWeComSyncClient.java
@@ -206,6 +206,7 @@ public class RealWeComSyncClient implements WeComSyncClient {
                     members.add(WeComConversationMember.builder()
                             .userId(member.getUserId())
                             .name(resolveMemberName(service, member))
+                            .type(member.getType())
                             .build());
                 }
             }
diff --git a/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/WeComConversationMember.java b/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/WeComConversationMember.java
index b9f2db5..261fb39 100644
--- a/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/WeComConversationMember.java
+++ b/backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/sync/WeComConversationMember.java
@@ -13,4 +13,5 @@ public class WeComConversationMember {
 
     private String userId;
     private String name;
+    private Integer type;
 }
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ChannelIdentityController.java b/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ChannelIdentityController.java
new file mode 100644
index 0000000..0f5d241
--- /dev/null
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ChannelIdentityController.java
@@ -0,0 +1,82 @@
+package com.sino.mci.channel.controller;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.sino.mci.admin.security.AuthContext;
+import com.sino.mci.channel.dto.ChannelIdentityResponse;
+import com.sino.mci.channel.entity.ChannelSubject;
+import com.sino.mci.channel.repository.ChannelSubjectMapper;
+import com.sino.mci.crm.entity.ChannelIdentity;
+import com.sino.mci.crm.entity.Person;
+import com.sino.mci.crm.repository.ChannelIdentityMapper;
+import com.sino.mci.crm.repository.PersonMapper;
+import com.sino.mci.shared.web.ApiResponse;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("/api/v1/channel-identity")
+@RequiredArgsConstructor
+public class ChannelIdentityController {
+
+    private final ChannelIdentityMapper channelIdentityMapper;
+    private final PersonMapper personMapper;
+    private final ChannelSubjectMapper channelSubjectMapper;
+
+    @GetMapping("/list")
+    public ApiResponse<List<ChannelIdentityResponse>> listChannelIdentities() {
+        String tenantCode = AuthContext.currentTenantCode();
+        List<ChannelIdentity> identities = channelIdentityMapper.selectList(
+                new LambdaQueryWrapper<ChannelIdentity>()
+                        .eq(ChannelIdentity::getTenantCode, tenantCode)
+                        .orderByDesc(ChannelIdentity::getId));
+
+        if (identities.isEmpty()) {
+            return ApiResponse.ok(Collections.emptyList());
+        }
+
+        Set<Long> personIds = identities.stream()
+                .map(ChannelIdentity::getPersonId)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+        Set<Long> subjectIds = identities.stream()
+                .map(ChannelIdentity::getSubjectId)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+
+        Map<Long, Person> personMap = personIds.isEmpty() ? Collections.emptyMap()
+                : personMapper.selectBatchIds(personIds).stream()
+                        .collect(Collectors.toMap(Person::getId, p -> p));
+        Map<Long, ChannelSubject> subjectMap = subjectIds.isEmpty() ? Collections.emptyMap()
+                : channelSubjectMapper.selectBatchIds(subjectIds).stream()
+                        .collect(Collectors.toMap(ChannelSubject::getId, s -> s));
+
+        List<ChannelIdentityResponse> responses = identities.stream().map(identity -> {
+            ChannelIdentityResponse response = new ChannelIdentityResponse();
+            response.setId(identity.getId());
+            response.setTenantCode(identity.getTenantCode());
+            response.setChannelType(identity.getChannelType());
+            response.setChannelUserId(identity.getChannelUserId());
+            response.setChannelUserName(identity.getChannelUserName());
+            response.setSubjectId(identity.getSubjectId());
+            ChannelSubject subject = identity.getSubjectId() == null ? null : subjectMap.get(identity.getSubjectId());
+            response.setSubjectName(subject == null ? null : subject.getSubjectName());
+            response.setPersonId(identity.getPersonId());
+            Person person = identity.getPersonId() == null ? null : personMap.get(identity.getPersonId());
+            response.setPersonName(person == null ? null : person.getPersonName());
+            response.setPersonType(person == null ? null : person.getPersonType());
+            response.setStatus(identity.getStatus());
+            return response;
+        }).collect(Collectors.toList());
+
+        return ApiResponse.ok(responses);
+    }
+}
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ConversationController.java b/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ConversationController.java
index 716e8a2..2a009f4 100644
--- a/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ConversationController.java
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/controller/ConversationController.java
@@ -3,7 +3,9 @@ package com.sino.mci.channel.controller;
 import com.sino.mci.admin.security.AuthContext;
 import com.sino.mci.channel.dto.BindConversationAccountRequest;
 import com.sino.mci.channel.dto.BindConversationTagsRequest;
+import com.sino.mci.channel.dto.ConversationParticipantResponse;
 import com.sino.mci.channel.dto.CreateConversationRequest;
+import com.sino.mci.channel.dto.TagResponse;
 import com.sino.mci.channel.dto.UpdateConversationRequest;
 import com.sino.mci.channel.entity.Conversation;
 import com.sino.mci.channel.service.ConversationService;
@@ -73,4 +75,18 @@ public class ConversationController {
         conversationService.bindTags(tenantCode, conversationId, request);
         return ApiResponse.ok();
     }
+
+    @GetMapping("/{conversation_id}/participants")
+    public ApiResponse<List<ConversationParticipantResponse>> listParticipants(
+            @RequestHeader("X-Tenant-Code") String tenantCode,
+            @PathVariable("conversation_id") Long conversationId) {
+        return ApiResponse.ok(conversationService.listParticipants(tenantCode, conversationId));
+    }
+
+    @GetMapping("/{conversation_id}/tags")
+    public ApiResponse<List<TagResponse>> listTags(
+            @RequestHeader("X-Tenant-Code") String tenantCode,
+            @PathVariable("conversation_id") Long conversationId) {
+        return ApiResponse.ok(conversationService.listTags(tenantCode, conversationId));
+    }
 }
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ChannelIdentityResponse.java b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ChannelIdentityResponse.java
new file mode 100644
index 0000000..ff2ef7b
--- /dev/null
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ChannelIdentityResponse.java
@@ -0,0 +1,19 @@
+package com.sino.mci.channel.dto;
+
+import lombok.Data;
+
+@Data
+public class ChannelIdentityResponse {
+
+    private Long id;
+    private String tenantCode;
+    private String channelType;
+    private String channelUserId;
+    private String channelUserName;
+    private Long subjectId;
+    private String subjectName;
+    private Long personId;
+    private String personName;
+    private Integer personType;
+    private Integer status;
+}
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ConversationParticipantResponse.java b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ConversationParticipantResponse.java
new file mode 100644
index 0000000..f71b7b1
--- /dev/null
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/ConversationParticipantResponse.java
@@ -0,0 +1,19 @@
+package com.sino.mci.channel.dto;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class ConversationParticipantResponse {
+
+    private Long id;
+    private Integer participantType;
+    private LocalDateTime joinTime;
+    private Long channelIdentityId;
+    private String channelUserId;
+    private String channelUserName;
+    private Long personId;
+    private String personName;
+    private Integer personType;
+}
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/dto/TagResponse.java b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/TagResponse.java
new file mode 100644
index 0000000..7122b30
--- /dev/null
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/dto/TagResponse.java
@@ -0,0 +1,16 @@
+package com.sino.mci.channel.dto;
+
+import lombok.Data;
+
+@Data
+public class TagResponse {
+
+    private Long id;
+    private String tenantCode;
+    private Long parentId;
+    private String tagPath;
+    private Integer level;
+    private String tagName;
+    private String tagSource;
+    private Integer status;
+}
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/repository/ConversationParticipantMapper.java b/backend/mci-server/src/main/java/com/sino/mci/channel/repository/ConversationParticipantMapper.java
index aaea9d5..51e1d0e 100644
--- a/backend/mci-server/src/main/java/com/sino/mci/channel/repository/ConversationParticipantMapper.java
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/repository/ConversationParticipantMapper.java
@@ -2,8 +2,12 @@ package com.sino.mci.channel.repository;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.sino.mci.channel.entity.ConversationParticipant;
+import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
 
 @Mapper
 public interface ConversationParticipantMapper extends BaseMapper<ConversationParticipant> {
+
+    @Delete("DELETE FROM mci_conversation_participant WHERE conversation_id = #{conversationId}")
+    void physicalDeleteByConversationId(Long conversationId);
 }
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/service/ConversationService.java b/backend/mci-server/src/main/java/com/sino/mci/channel/service/ConversationService.java
index 47d6c2d..885373a 100644
--- a/backend/mci-server/src/main/java/com/sino/mci/channel/service/ConversationService.java
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/service/ConversationService.java
@@ -3,17 +3,25 @@ package com.sino.mci.channel.service;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.sino.mci.channel.dto.BindConversationAccountRequest;
 import com.sino.mci.channel.dto.BindConversationTagsRequest;
+import com.sino.mci.channel.dto.ConversationParticipantResponse;
 import com.sino.mci.channel.dto.CreateConversationRequest;
+import com.sino.mci.channel.dto.TagResponse;
 import com.sino.mci.channel.dto.UpdateConversationRequest;
 import com.sino.mci.channel.entity.ChannelAccount;
 import com.sino.mci.channel.entity.ChannelAccountConversation;
 import com.sino.mci.channel.entity.Conversation;
+import com.sino.mci.channel.entity.ConversationParticipant;
 import com.sino.mci.channel.entity.ConversationTagBinding;
 import com.sino.mci.channel.repository.ChannelAccountConversationMapper;
 import com.sino.mci.channel.repository.ChannelAccountMapper;
 import com.sino.mci.channel.repository.ConversationMapper;
+import com.sino.mci.channel.repository.ConversationParticipantMapper;
 import com.sino.mci.channel.repository.ConversationTagBindingMapper;
+import com.sino.mci.crm.entity.ChannelIdentity;
+import com.sino.mci.crm.entity.Person;
 import com.sino.mci.crm.entity.Tag;
+import com.sino.mci.crm.repository.ChannelIdentityMapper;
+import com.sino.mci.crm.repository.PersonMapper;
 import com.sino.mci.crm.repository.TagMapper;
 import com.sino.mci.exception.BusinessException;
 import com.sino.mci.shared.util.JsonUtils;
@@ -22,7 +30,12 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.CollectionUtils;
 
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 @Service
@@ -34,6 +47,9 @@ public class ConversationService {
     private final ConversationTagBindingMapper conversationTagBindingMapper;
     private final TagMapper tagMapper;
     private final ChannelAccountMapper accountMapper;
+    private final ConversationParticipantMapper participantMapper;
+    private final ChannelIdentityMapper channelIdentityMapper;
+    private final PersonMapper personMapper;
 
     public List<Conversation> listConversations(String tenantCode) {
         return conversationMapper.selectList(
@@ -160,4 +176,95 @@ public class ConversationService {
             }
         }
     }
+
+    public List<ConversationParticipantResponse> listParticipants(String tenantCode, Long conversationId) {
+        getConversation(tenantCode, conversationId);
+
+        List<ConversationParticipant> participants = participantMapper.selectList(
+                new LambdaQueryWrapper<ConversationParticipant>()
+                        .eq(ConversationParticipant::getConversationId, conversationId)
+                        .orderByAsc(ConversationParticipant::getId));
+
+        if (participants.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        Set<Long> channelIdentityIds = participants.stream()
+                .map(ConversationParticipant::getChannelIdentityId)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+        Set<Long> personIds = participants.stream()
+                .map(ConversationParticipant::getPersonId)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+
+        Map<Long, ChannelIdentity> identityMap = channelIdentityIds.isEmpty() ? Collections.emptyMap()
+                : channelIdentityMapper.selectBatchIds(channelIdentityIds).stream()
+                        .collect(Collectors.toMap(ChannelIdentity::getId, Function.identity()));
+        Map<Long, Person> personMap = personIds.isEmpty() ? Collections.emptyMap()
+                : personMapper.selectBatchIds(personIds).stream()
+                        .collect(Collectors.toMap(Person::getId, Function.identity()));
+
+        return participants.stream().map(participant -> {
+            ConversationParticipantResponse response = new ConversationParticipantResponse();
+            response.setId(participant.getId());
+            response.setParticipantType(participant.getParticipantType());
+            response.setJoinTime(participant.getJoinTime());
+            response.setChannelIdentityId(participant.getChannelIdentityId());
+
+            ChannelIdentity identity = participant.getChannelIdentityId() == null
+                    ? null : identityMap.get(participant.getChannelIdentityId());
+            response.setChannelUserId(identity == null ? null : identity.getChannelUserId());
+            response.setChannelUserName(identity == null ? null : identity.getChannelUserName());
+
+            Person person = participant.getPersonId() == null
+                    ? null : personMap.get(participant.getPersonId());
+            response.setPersonId(participant.getPersonId());
+            response.setPersonName(person == null ? null : person.getPersonName());
+            response.setPersonType(person == null ? null : person.getPersonType());
+
+            return response;
+        }).collect(Collectors.toList());
+    }
+
+    public List<TagResponse> listTags(String tenantCode, Long conversationId) {
+        getConversation(tenantCode, conversationId);
+
+        List<ConversationTagBinding> bindings = conversationTagBindingMapper.selectList(
+                new LambdaQueryWrapper<ConversationTagBinding>()
+                        .eq(ConversationTagBinding::getConversationId, conversationId)
+                        .orderByAsc(ConversationTagBinding::getId));
+
+        if (bindings.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        Set<Long> tagIds = bindings.stream()
+                .map(ConversationTagBinding::getTagId)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+
+        Map<Long, Tag> tagMap = tagMapper.selectBatchIds(tagIds).stream()
+                .collect(Collectors.toMap(Tag::getId, Function.identity()));
+
+        return bindings.stream()
+                .map(binding -> {
+                    Tag tag = tagMap.get(binding.getTagId());
+                    if (tag == null) {
+                        return null;
+                    }
+                    TagResponse response = new TagResponse();
+                    response.setId(tag.getId());
+                    response.setTenantCode(tag.getTenantCode());
+                    response.setParentId(tag.getParentId());
+                    response.setTagPath(tag.getTagPath());
+                    response.setLevel(tag.getLevel());
+                    response.setTagName(tag.getTagName());
+                    response.setTagSource(tag.getTagSource());
+                    response.setStatus(tag.getStatus());
+                    return response;
+                })
+                .filter(Objects::nonNull)
+                .collect(Collectors.toList());
+    }
 }
diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/service/SyncDataPersister.java b/backend/mci-server/src/main/java/com/sino/mci/channel/service/SyncDataPersister.java
index e194f41..fbc95f1 100644
--- a/backend/mci-server/src/main/java/com/sino/mci/channel/service/SyncDataPersister.java
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/service/SyncDataPersister.java
@@ -135,11 +135,10 @@ public class SyncDataPersister {
 
     @Transactional
     public void refreshParticipants(String tenantCode, Long subjectId, Conversation conversation, WeComConversation conv) {
-        conversationParticipantMapper.delete(
-                new LambdaQueryWrapper<ConversationParticipant>()
-                        .eq(ConversationParticipant::getConversationId, conversation.getId()));
+        conversationParticipantMapper.physicalDeleteByConversationId(conversation.getId());
 
         for (WeComConversationMember member : conv.getMemberList()) {
+            log.debug("[SyncDataPersister] 群聊成员 userId={}, type={}", member.getUserId(), member.getType());
             ChannelIdentity identity = findOrCreateIdentity(tenantCode, subjectId, member);
 
             ConversationParticipant participant = new ConversationParticipant();
@@ -165,7 +164,13 @@ public class SyncDataPersister {
                         .eq(ChannelIdentity::getChannelType, CHANNEL_WECOM)
                         .eq(ChannelIdentity::getChannelUserId, member.getUserId()));
 
+        int personType = resolveMemberPersonType(member.getType());
         if (identity != null) {
+            Person existPerson = personMapper.selectById(identity.getPersonId());
+            if (existPerson != null && !existPerson.getPersonType().equals(personType)) {
+                existPerson.setPersonType(personType);
+                personMapper.updateById(existPerson);
+            }
             return identity;
         }
 
@@ -174,7 +179,7 @@ public class SyncDataPersister {
         person.setTenantCode(tenantCode);
         person.setPersonCode(member.getUserId());
         person.setPersonName(displayName);
-        person.setPersonType(PERSON_TYPE_CUSTOMER);
+        person.setPersonType(personType);
         person.setStatus(1);
         personMapper.insert(person);
 
@@ -197,6 +202,11 @@ public class SyncDataPersister {
         return userId != null && !userId.isBlank() ? userId : "未知";
     }
 
+    private int resolveMemberPersonType(Integer memberType) {
+        // 企微群聊成员类型：1=企业成员，2=外部联系人
+        return memberType != null && memberType == 1 ? PERSON_TYPE_INTERNAL : PERSON_TYPE_CUSTOMER;
+    }
+
     private void ensureBinding(Long accountId, Long conversationId, int bindingType) {
         ChannelAccountConversation existing = accountConversationMapper.selectOne(
                 new LambdaQueryWrapper<ChannelAccountConversation>()