1. landing visa tourists are required to bring 1W baht in cash when entering the country alone, and 2W baht in cash when entering the country for families. Spot checks will be conducted when entering the country. If it is found that there is not enough cash, it will be repatriated. If you apply for a tourist visa in advance, you will generally not check it.

2. You don't need to bring Thai baht, but RMB or US dollars will do. As long as it is equivalent to 4000 RMB.