应该这样就可以吧?
-Yes.
还有,两孩子是美国公民,若我持回美证带孩子回国探亲,孩子只要中国使馆的旅行证就可以,对吧?
-Yes.
但如果我是等到绿卡了再回,孩子就不可以用旅行证,而是要有有效的中国签证了,我的理解对吗?
-If your children's 旅行证 is still valid (get it before you get the green card), your children can use the 旅行证 to travel to China, but if your children 旅行证 has expired or they do not get the 旅行证 before you get the green card, they have to apply for the 中国签证, not more 旅行证.