为父母申请绿卡的时候同时申请了回乡证。I-130批了，身体检查报告也交上去了，回乡证也收到了. 现在就等打指模和面试了。现在老父有事要回国，
我的问题是：他可以用回乡证回国吗？会影响他的绿卡申请吗？
-He has to come back for the biometrics (fingerprinting) and the interview (if any). If he can not come back in time, he can re-schedule it.
如果会影响他的绿卡申请，我可不可以直接到local的移民局办公室直接打指模，和申请面试？
-No. He has to receive the appointment notice to do the biometrics and interview.
