I am a Us citizen Is it possible to get a two year visa to China?

A Chinese-American born in China (Taiwan, HongKong and Macau included) may apply for a Multiple Entry "L" Visa valid for 24 months.The photocopy of the personal information page of his/her passport is required to provide.

Foreign spouse and children of a Chinese citizen may apply for a Multiple Entry "L" Visa valid for 24 months.The original and photocopy of relevant Marriage Certificate,Birth Certificate, Kinship Certificate and other necessary documents are required to provide.

if you don't satisfy the above conditions, you can't get a two years visa to China.