请教8老师，父母在国内申请绿卡， 最近130已批， 我在准备DS-260材料。请问父母的无犯罪公证是什么时候需要, 是提交DS-260时要呢 还是去广州面试的时候需要。
-Upload the copy to NVC and bring the original to the intertview. By the way, this document is valid only for one year. If it was issued for more than one year when the interview takes place, your parents need to get the new one and bring it with them to the interview.
另外， 现在130批准后大概还需要多久才能去广州面试？
-Several months to one year, case by case.
