Urgent! Kneel down! How many days can a student stay in the United States during the summer vacation without going home and being hacked?

Theoretically speaking, once you exceed the time on I-20, your status in the United States is illegal; If you stay in the United States, as long as the immigration people don't come to check you, there is actually no problem, but once found, it will inevitably affect your record and the possibility of leaving the country in the future; So I still suggest not to do that. If you don't come back, apply for other courses or continue to apply for the language course of the school, the new I-20, then there is no problem.

Supplement: Since your I-20 form is valid, there is no problem. Even if there are no classes in summer, your status in the United States is legal. Don't worry; I don't know if you mean that your visa has expired. If it is a visa issue, as long as you don't return to China, the I-20 form is valid, and your status in the United States is still legal. But if you return to China, your visa has expired and you need to renew it at the consulate.