父母綠卡身份回國，原定在國內呆4/5個月回美。但媽媽近日摔倒骨折，估計好幾個月不能動彈。如果媽媽因傷病無法在6個月內返美，請教大俠指點可否申請延期和如何辦理。謝謝。
-As long as they return to US within one year, they will be fine. Just bring the Dr. certificate or the hospital bills just in case. If they can not return for > one year, they need to get the Returning Resident Visa (SB-1 Visa) from US Consulate in Guangzhou.
