The difference between f 1 visa 5 years and 1 year.

Legal analysis: F 1 visa refers to the American study visa. Now the general study visa is valid for 5 years. In the past, it usually took four years to study undergraduate in the United States. If some people need to learn a language, it will take five years. When they graduate, they can apply for OPT for one year and work legally in any company. Therefore, the validity period of a general study visa is 5 years. It means that within five years, your visa is valid and you can go back and forth multiple times. You don't need to reapply for a visa every time you enter or leave the United States. After five years, the visa expired. If you still need to enter and leave the United States at that time, you need to re-apply for a visa to the United States and pay a visa fee again.

Legal basis: Article 9 of the Law of People's Republic of China (PRC) on Exit and Entry Administration. China citizens shall apply for passports or other travel documents when leaving or entering the country. China citizens who want to go to other countries or regions also need to obtain visas or other entry permits. However, unless the China government has signed visa exemption agreements with other governments or the Ministry of Public Security and the Ministry of Foreign Affairs provide otherwise. China citizens who leave or enter the country as seafarers and work on foreign ships shall apply for a seaman's certificate according to law.