Yes, the Royal University of Nanbang in northern Thailand enrolls preparatory students every year. It is a training institution specially set up for foreign students who have never learned or learned a little Thai, and no diploma is required. The training time is from August each year to March the following year, with more than 800 class hours. If you pass Thai training, you can choose any major in the university to continue your study, and you need 1. High school diploma and fairness certificate II. No criminal record certificate. The university has two majors for international students, 1. Thai major II. Business Thai major.

I majored in Thai in this university.

Oh, forget the cost. Compared with big cities like Bangkok and Chiang Mai, Nanbang is very cheap. The total annual expenditure is about 25,000-30,000 RMB.