American visa on arrival

Generally speaking, the non-immigrant visa stays in the United States for half a year, because when you enter the country, the immigration officer will ask you how long you are going to stay in the United States. If you say 10 days is enough, he will give you at least one month. You said it would take more than a month, and he gave you at least three months.

You said to stay with your relatives for half a year, and if you take a walk, he will give you half a year. Now many people in China don't understand English, even if you ask them. Usually he will give you half a year. Customs officials have the right to give you more, but you must have a good reason. Generally, they don't suggest asking, and sometimes they are self-defeating.