What materials are needed for visa renewal? Please be more detailed

valid passport: if your passport will expire or be damaged within six months from your expected arrival date in the United States, or there is no blank visa issuance page on your passport, please apply for a new passport before coming for an interview. DS-16 form confirmation page. Please indicate your name code, Chinese name, Chinese home address, company name and address on it. Please click here for an example. Please click here to check the code. One photo: a color frontal photo of a 2 "x2" (51 mm x51 mm) square with a white background taken within 6 months. Please see the photo requirements for details. Original receipt of visa application fee: You can pay the visa application fee of 94 RMB at any branch of China CITIC Bank in China (effective from July 24th, 28). Please stick the receipt on the lower half of the confirmation page with glue or adhesive tape. Please click here to see an example. Passports containing previous visas to the United States, including expired passports. Evidence that can explain why you will definitely return to China: produce documents that are binding on you in economic, social, family or other aspects to help you prove that you intend to return to China after a short stay in the United States. Due to different personal circumstances, the evidence that the applicant should produce is also different. The following documents can help the visa officer to evaluate whether you intend to return to China: household registration book, ID card, employment certificate, payroll that objectively reflects your monthly income, passbook with regular access records, etc. Invitation letter: If you are invited to visit a resident of the United States, it will be helpful to provide the following information for your application: information of the inviter, purpose of your visit to the United States, and pre-arranged travel schedule. If you just travel to the United States, then you don't need to show an invitation letter. Proof of funds: prove that you have the ability to pay for the whole period of your stay in the United States without working, such as a payroll that objectively reflects your monthly income, a passbook with regular access records, etc. Note: Please don't show your bank deposit certificate. The certificate of deposit is not helpful for visa application. If you are going to the United States for business activities, please consider bringing the following information to the interview: where you will visit, who you will meet, what will be discussed during the meeting and what products you plan to buy in the United States. The following documents may be helpful to the application: a detailed invitation letter issued by the American partner stating the purpose of the applicant's visit to the United States; Contracts or other agreements signed with American partners; Information about machines, software or other equipment to be tested or purchased in the United States, such as product brochures or product catalogs. If you visit relatives in the United States, you should provide materials to prove that you have a true and uninterrupted kinship with the inviter, and you should also consider providing their status after entering or immigrating to the United States. The following documents may be helpful to your application: household registration book or other documents that can prove true kinship, photos taken with American relatives in recent years, copies of American passports or green cards of relatives, copies of passports of relatives staying in the United States for a short time, and copies of American visas. If your last stay in the United States exceeded the date specified on the I-94 card at the time of entry, please show the original extension certificate approved by the US Department of Homeland Security during the interview.