各位老师，我现在想给在国内的父母申请绿卡，想请教一下，我和父母都需要准备那些材料？
-Just file I-130 based on the I-130 instructions and indicate in the I-130 that your parents will apply for immigration visa in Guangzhou, China. Then, wait for NVC to contact you and you just follow the NVC instructions to do what they ask.
还有他们现在国内，如果材料递交上去，是不是在等绿卡期间， 他们不能申请探亲签证，只有拿到绿卡了才能过来？
-Correct.
从国内申请，大概需要多久？
-One to two years, case by case.
问题比较多，麻烦各位了。
-Just file I-130 based on the I-130 instructions and indicate in the I-130 that your parents will apply for immigration visa in Guangzhou, China. Then, wait for NVC to contact you and you just follow the NVC instructions to do what they ask.
还有他们现在国内，如果材料递交上去，是不是在等绿卡期间， 他们不能申请探亲签证，只有拿到绿卡了才能过来？
-Correct.
从国内申请，大概需要多久？
-One to two years, case by case.
问题比较多，麻烦各位了。
