Mexican Passport.. Roundtrip From/To BKK... Connection in Xiamen.. Do I need Visa?

I'm a Mexican citizen traveling from Los Angeles to Bangkok with a connection in Xiamen, Do I need visa if:
1st Connection is 3 hours and 10 minutes? and 2nd connection is 5 hours? (I guess no time for leave airport)
Also 1st connection (3hrs & 10 minutes) does give me enough time to go thru immigration or Do I go thru a special line with no immigration as other airports?