Hi Kangbo,
Check 2.2.7 in below document.
How to Investigate Timeouts In Synchronous XI PI
The parameter: 'xiadapter.inbound.timeout.default' is an Adapter Engine messaging system parameter. The value specifies how long the messaging system waits for a response during synchronous communication. If this time elapses, a "MessageExpired" exception is triggered
Regards,
Praveen.