对（2）附加一个小问题。如果I130没下来，但B2签证到期，受益者离境，是否就意味自动放弃绿卡申请？
-No. If 受益者 does not file I-485, he/she can apply for the immigration visa in China using consular processing. If I-485 is filed, they can use AP to go back to China. if not use AP, the I-485 will be invalid, but they still can apply for the immigration visa in China.
