不过他有绿卡每年需要来住几天 is not enough to hold his

permanent residency status.

It has to be more than 183 days/ year. 

 

That's why:  前两年有一次来的时候绿卡被没收了再来不了了

所有跟帖： 

• Yes, I heard about 白皮书 -HenryLi- ♂ (0 bytes) () 05/17/2019 postreply 07:50:12