Urgent! ! Problems existing in the exit of American V92 visa

The American V92 visa is a tourist visa, and the departure time after approval generally needs to leave the country within 180 days after approval. During this 180 days, you can enter and leave the country freely within the time limit allowed by the visa and enter and leave the country many times. It should be noted that the validity period of a visa is usually longer than the length of stay, and the visa can be used again during the validity period. In addition, in some cases, it is necessary to leave the country immediately after obtaining a visa for a period of time.