How long can parents of children studying in the United States stay when applying for passports?

Parents whose children are studying in the United States can apply for a US tourist/business visa.

1, visiting relatives in the United States can stay for half a year at most.

2. The visa for visiting relatives is valid for one year. After obtaining a visa, you can choose to visit relatives in the United States at any time within one year. Generally speaking, the time for visiting relatives is three months, and the longest stay in the United States is six months.

You can apply for renewal of B2 visa, which is also valid for one year.