回複：回複：回複：回複：863211老師，皮匠老師和小白兔老師以及有經驗的大俠請幫幫我

He may apply for reentry permit for the travel which can allow him to saty outside U.S. for maximum of two years. It is very important for him to keep the GC valid. Otherwise, he will lose everything such as retirement benefits. Why doesn't he just find some other part time job such as working on Walmart, Chinese restaurant temporarily?