B2 visa issue, this is F 1.

Looks like I need a letter of introduction from the school. Can I ask iss office for it?

A: Yes.

Is it feasible for parents to have a visa?

A: Sure, but it depends on your specific situation. Have enough information to show the visa officer that you are not inclined to emigrate, such as income, occupation, assets, travel plans and so on.

Go to the websites of American embassies and consulates, and then go to some related forums of international students' websites. For example, the internet, unnamed space and so on. , rich in information.