General immigration conditions for U.S. investment immigrants:

Residence period requirements: The minimum number of consecutive years of residence after obtaining permanent residence in the United States is 5 years. If you do not stay in the United States for more than half a year, you must issue a certificate of intention to abandon your U.S. residence, and then recalculate the number of consecutive years of residence. You can apply for naturalization to the Immigration Bureau only if you have stayed for at least 3 years or half of the legal period. You must live in the place where you apply for naturalization for more than 6 months.

Marriage naturalization requirements: If you apply for naturalization due to marriage, you must maintain a married life of more than two years, and both parties need to apply for naturalization together.

Age requirements for naturalization: The minimum age for naturalization is 18 years old. Under the age of 16, if both parents are U.S. citizens, they will be naturalized automatically. Those between the two must apply independently. If only one of the parents is a legal U.S. citizen, the legal parent must become a naturalized child when the child reaches 18 years old. Apply.

Language requirements: Except for those who are over 50 years old and have lived in the United States for more than 20 years, those who are over 55 years old and have obtained permanent residency and have lived in the United States for 15 years are exempt from the English test. All other requirements require preliminary proficiency in listening, speaking, reading and writing, and an oral test is used. It is difficult to pass the test, but there is an opportunity to make up the test.

Personal character requirements: good performance during the residence period, no adultery, bigamy, failure to fulfill support obligations, alcoholism and other bad conduct.

Personal knowledge requirements: Understand U.S. history, the Constitution and other laws. In particular, you must be familiar with important figures, time, government organizations, and the Constitution and other important legal contents in American history.

Requirements for uniqueness of nationality: Dual nationality cannot be held, which means that naturalization in the United States must give up the nationality of the home country.