What if the American tourist visa expires? I don't need to renew it in person.

American tourist visa applicants who have obtained B 1 (business), B2 (tourism/short-term visit), F (international student), J (exchange visitor) or H (short-term staff) visas can submit application materials to the CITIC Bank branch that provides this service if they meet the following conditions when applying for a visa again: the applicant must apply for a visa in embassies and consulates in China, USA, where the visa was obtained last time. Applicants who have been asked for an additional administrative hearing for their last visa application, and those who have been given the word "Approved" and printed the date in the remarks column, must make an appointment for an interview and go to the embassy for an interview in person. These applicants cannot use the interview-free service. If they use this service, the processing time of visa applications will be delayed. Some visa applicants have the following specific restrictions: applicants who apply for F, J and H visas again must go back to the school, research institute or work unit where they applied last time to communicate with visiting scholar visa holders. The research project they are engaged in in in the United States this time should be the same as when they applied last time, and the project number is the same as that on the last visa. Applicants with ordinary business passports can also use face-to-face visa application services. Applicants who meet all the above requirements can submit the required visa application materials to China CITIC Bank in person or by proxy during working hours. Please note: all applicants who enjoy the interview-free renewal service need to provide their fingerprints in person at the embassy. Applicants must bring the receipt issued by China CITIC Bank into the visa hall to provide fingerprints, but there is no need for an interview.