import base64, hashlib

sign_b64='MDNjOTRmZjA5NjBhZDIwYWUyM2NiN2U3MDEzNzcxNjE='
print('decoded sign:', base64.b64decode(sign_b64).decode())
content="""<Return>\n  <storecode>C12227</storecode>\n  <orderno>FW2606251457204991</orderno>\n  <expno>6722887066</expno>\n  <operator>15019129480</operator>\n  <operdate>2026-06-25 15:09:34</operdate>\n  <status>YY</status>\n  <content>预约用户送货日期：2026-06-26 12:59:59;用户原因-用户主动改约（出差） </content>\n  <yydate>2026-06-26 12:59:59</yydate>\n  <remark>1</remark>\n</Return>"""
for key in ['Haier,123','RRS,123']:
    raw=content+key
    h=hashlib.md5(raw.encode('utf-8')).hexdigest()
    b=base64.b64encode(h.encode('utf-8')).decode()
    print(key, h, b)

# also raw bytes variant
for key in ['Haier,123','RRS,123']:
    raw=content+key
    digest=hashlib.md5(raw.encode('utf-8')).digest()
    b=base64.b64encode(digest).decode()
    print('raw', key, b)