Let me give an authoritative answer: according to the relevant regulations of the State Administration of Foreign Exchange, there is only a limit on the amount of RMB that inbound passengers can carry, and the limit for each person to carry RMB is 20,000 yuan. If the limit is exceeded, the cash will be returned overseas or punished accordingly. There are no restrictions on foreign currency entry passengers. Restrictions on bringing foreign currency are limited to outbound passengers, and each person may not bring more than $5,000 in cash at a time. If it is brought in from abroad and you want to take it away when you leave the country, you can declare it to the customs when you enter the country, and the customs will release it according to the declared quantity when you leave the country.

In this way, you can bring in foreign currency from Taiwan Province Province every time, and then convert it into RMB at home. It's safer to do this.