When I went to Thailand to join a tour group, I saw a clause in the tour group saying that about 3,000 RMB in cash must be prepared for entry and exit inspection when entering Thailand. Is it true?/Yo

When I went to Thailand to join a tour group, I saw a clause in the tour group saying that about 3,000 RMB in cash must be prepared for entry and exit inspection when entering Thailand. Is it true?/You don't say. Landing visa will take random samples, whether traveling with a group or traveling independently. It is said that the purpose is to prevent stranded illegal workers, that is to say, they are not badly dressed and generally will not take random samples. In addition, it seems inconvenient to exchange RMB for local currency when going to Southeast Asian countries. It is best to exchange local currency in advance. If you go to many countries, you can change 400 dollars and take it with you. It is equivalent to about 3000 RMB. However, the upstairs said that having a return ticket should also be a solution, which has not been tried for the time being.