以前一对老夫妇女儿在美国念书,老先生的妹妹已经是美国公民了,打算帮老先生夫妇办移民。老先生当时很犹豫要不要办,说如果办了,要不就是这十几年不能来美国,要不就只能这十几年留在美国不走,直到移民成功。请问他们这样说是不符合法律的吗?
-The only way is that their daughter became a US citizen and then, sponsor their green card.They can not get the green card under 老先生的妹妹' sponsor in this case.