Anybody helps?

A little more info.

signal sender=:1.299 -> dest=(null destination) serial=2897 path=/org/freedesktop/Telepathy/Connection/gabble/jabber/crtmike_40jabber_2eorg_2f030918ab; interface=org.freedesktop.Telepathy.Connection.Interface.Aliasing; member=AliasesChanged
   array [
      struct {
         uint32 26
         string "老猫群"
      }
   ]

Can you get a debug log from Gabble, to verify exactly what is being sent to it from the network?

But I think your server is sending you XML which it shouldn't be. RFC 6120 says <http://xmpp.org/rfcs/rfc6120.html#intro-terms>:

    some examples in this document use the form "&#x...." as a notational device to represent [UNICODE] characters (e.g., the string "&#x0159;" stands for the Unicode character LATIN SMALL LETTER R WITH CARON); this form is definitely not to be sent over the wire in XMPP systems.

The server should be sending you UTF-8, not escape sequences.

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