What materials do I need to renew my b 1b2 visa when it expires?

Passport, photo, DS 160 information registration form, visa fee.

Visa b 1b2:

65438 +0. B- 1 Visa is issued to foreigners engaged in short-term business activities in the United States. The holder can engage in short-term business activities in the United States, such as business visits, contract negotiations, ordering or selling products, and attending business exhibitions. According to the bilateral relations of different countries, the United States issues one or more valid B- 1 visas, and the validity period is also divided into three months, 1 year, two years, five years, 10 year or even permanent validity. At present, residents of Japan, Taiwan Province Province, Hongkong and Singapore can apply for a valid B- 1 visa for multiple entry, while Chinese mainland residents can only apply for a multiple entry visa.

2. American B-2 tourist visa is a non-immigrant visa, and its issuance is decided by American overseas consular agencies, and American immigration authorities will not ask. B-2 tourist visa application has a wide range of reasons. Generally speaking, anyone who goes to the United States for sightseeing, entertainment, visiting relatives and friends, seeking medical treatment, attending conferences, attending exhibitions and handling personal affairs can apply for a B-2 visa. Therefore, it is the largest number of non-immigrant visas issued in the United States every year. According to the American Immigration and Nationality Law, anyone who applies for the United States is presumed to have the intention to immigrate to the United States. Therefore, unless otherwise stipulated by law, non-immigrant visa applicants should prove that they have no intention of immigrating to the United States. The B-2 visa is decided by the American consul on the spot, which has a strong subjective color and is easily regarded as "immigration tendency" and refused. This also makes many candidates very nervous during the interview.