How long is the US visa valid?

1. business tourist visa for visiting relatives: the validity period of the business tourist visa for the United States is one year from the date of obtaining the visa, and it can be returned multiple times within one year. Second, study abroad visa: the validity period of the American class F study abroad visa is one year. 3. Work visa: The work visa is generally valid for 3 years and can be extended once. The validity of other seasonal labor visas depends on the needs. 4. Special talent visa: Generally, the O visa is valid for one year and can be extended once a year. Legal basis: Passport Law of the People's Republic of China Article 5 Citizens who go abroad for non-official reasons, such as settling in a foreign country, visiting relatives, studying, getting employment, traveling or engaging in business activities, shall apply for an ordinary passport to the exit-entry administration department of the public security organ of the local people's government at or above the county level where their domicile is located.