他前阵子短期到美国renew了EAD，接着拿旧的EAD回了中国
现在renew的EAD生效了，他想托美国的朋友把新的EAD寄回国
这样他打算下次用新的EAD回美国
不知道这种拿旧EAD到中国，然后用新EAD回美国会不会有什么问题
-Do you mean AP or EAD, right? EAD can not be used to travel. Because he leave US before the AP is approved, technically he can not use this new approved AP to come back to US. If his old AP expires, he will be trouble to come back to US inless his I-485 is approved or getting H-1, H-4 or L visa to come back.
