About Sabah and Brunei tourism

You can change some foreign currency first, but they are all in large amounts. After you get off the plane, buy a phone card to exchange the money. There is a place in the local central shopping mall that specializes in exchanging RMB for foreign currencies. UnionPay can basically be used. There is no handling fee for cash withdrawals, and the repayment is settled according to the exchange rate. If the hotel and air tickets are all booked, just carry 5,000 yuan worth of currency on you. Not too much. It doesn't cost much just to eat and see over there. Unless making a large purchase.