How to judge whether he is Chinese-American?

Do you want to judge whether he is an American (with American life experience and background and familiar with American culture)? Still want to determine his nationality?

However, neither is easy to do.

If you want to judge whether this person is a Chinese who is familiar with American culture, first of all, you should be particularly familiar with American culture, at least not worse than ordinary Native Americans.

Determining whether he is an American citizen is actually more troublesome. Of course, the method is simple. Let him show the valid number of his passport, and then call to check the authenticity, just like verifying digital products.

But there are two problems: first, you have no right to let an American citizen show his passport. Only a few special agencies such as immigration, police or FBI have this privilege; Second, even if he shows a valid number, you still can't verify it in an effective way. Because, looking at the database of government departments still needs special permission.