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我父母2018年2月得到绿卡,2018年4月离境回的中国,我父亲身体不好所以他们一直呆在中国。请问他们必须什么时候回美国才能保持绿卡?要在美国呆多久?
-They must return to US before April. Otherwise, if they stay in China for > one year, their green card will be void automatically unless they can prove something out of control to prevent them to return on time (this is very complicate).
-They must return to US before April. Otherwise, if they stay in China for > one year, their green card will be void automatically unless they can prove something out of control to prevent them to return on time (this is very complicate).