為保證綠卡的有效,是否有在中國停留的時限?
-Your parents can not stay in China for > one year continuously. Also, they can not go forth and back between China and US too often, otherwise, their green card may be cancelled. Green card holders have to show their intent to live in US permanently.
您們是否有 有關移民父母醫療的信息? 我想這也是困擾很多想給父母辦移民的人的難題。
-Check it with your state. Different state has different policy.