American students should pay attention to these things when entering and returning to school.

Recently, a China student with a visa of F 1 was randomly selected by the customs and refused entry. It is reported that an international student from China returned to China for one month during the school holiday, and was questioned by the customs when he returned to the United States for too long. So under what circumstances will you be refused entry?

1. Has a criminal record.

As long as they are not American citizens, they may be investigated when entering the country and repatriated because of their past criminal records. In the past, there were almost serious criminal records, such as homicide, serious sexual abuse, sexual assault on minors, indecent and obscene acts against children, drug trafficking, fighting, beating and drunk driving. However, judging from recent cases, the possibility of revoking the green card due to minor crimes is not ruled out.

2. Oversea residence time is too long. According to US Customs regulations, all legal residents do not need to apply for any return permit within 180 days after leaving the country.

If you leave the country for more than 180 days, but within one year, although the law does not stipulate that you need to apply for a re-entry permit to the United States, according to the immigration law, the customs has the right to conduct "special treatment and inspection" to verify whether the parties really want to stay in the United States.

If you are a permanent resident who has been abroad for more than one year, you need to apply for a re-entry permit. The US Customs also stressed that green card residents who have left the United States for more than 180 days, if they have no tax declaration records, may also become a factor for customs officials to determine whether passengers intend to give up their identity.

The safest way to convince the Immigration Bureau is to ensure that you spend more time in the United States each year than in any other country. For example, if you live in the United States for six months every year (not necessarily continuously), China for four months and Singapore for two months, it is obvious that your main home is in the United States, so it is difficult for the Immigration Bureau to question your permanent resident status.

3. There is something wrong with the way to obtain a green card, providing false information or deliberately concealing facts when naturalization.

Green card obtained by some illegal means, such as providing false information or some false asylum behavior.