What should a 61-year-old couple do when they go to the United States to visit relatives? What is the process? (Please be more detailed)

First of all, applicants in the United States must present proof of employment, identity, tax payment, and housing in the United States. If there is no tax evasion or serious criminal record, the U.S. Consulate will send a notification letter in 1 to 2 weeks. Ask the respondent to go to the designated hospital for a physical examination. When all physical examinations are passed, you will be notified to go to the U.S. Consulate to check and submit the documents. You must bring the notification letter, physical examination information, and printed employment certificates, identity certificates, and tax payment certificates from your family members in the United States. Certificate, copy of housing certificate, Chinese passport and ID card. After checking the information, you will be asked to go for an interview the next day. The interview will ask you to tell your reasons for going to the United States, information about your family and relatives in the United States, and you. Personal information, if you pass the interview, you can buy a plane ticket. The U.S. Consulate will send your entry application to the U.S. Immigration Bureau, and then send a parcel. It cannot be opened until you enter the United States (get off the plane in the United States). In the future) your mail package and all the previous information will come in handy.