大人在中国教书，要申请I131吗？或者需要做其他什么手续吗？他们人已到了中国2个多月了。
-They need to come back to US before their stay in China reaches one year, then apply for reentry permit if they will stay in China for more than one year and less than two years.
-They need to come back to US before their stay in China reaches one year, then apply for reentry permit if they will stay in China for more than one year and less than two years.
