Staying longer than 3 months on a tourist visa

I am living in Chiang Mai Thailand, and am US citizen. I have visited China several times, but they give me a double entry 6 month visa. I want to stay in a temple and don't want to leave after three months, since it interrupts my stay. Do you think that friends or the Abbot of the temple can intercede for me at the public security bureau, so that I can stay for the whole 6 months without having to leave? My many friends there are always inviting me to stay in China, but the visa issue has always been an obstacle.