Let me tell you the answer! UnionPay is relatively well developed in Hong Kong, Macao and Southeast Asia. It can be used in most cities. There are more UnionPay ATMs in airports and scenic spots. Chiang Mai is an important city and tourist destination in Thailand. If you bring a UnionPay-marked debit card, you basically don’t have to worry about swiping the card and withdrawing cash. China UnionPay opened the acceptance of UnionPay cards in Thailand in January 2005. Currently, there are more than 40,000 store POS machines with the "UnionPay" logo and 30,000 ATMs in Thailand that can accept UnionPay cards. The market coverage is respectively 50% and 98%. The main tourist hotspot cities and regions that accept UnionPay cards are: Bangkok, Pattaya, Phuket, Chiang Mai, Koh Samui, etc. You can also pay directly by swiping your card at terminals with the "UnionPay" logo. At the ATMs of the following banks, you can withdraw Thai baht cash with domestic UnionPay cards regardless of whether they have the UnionPay logo: KasikornBank, BangkokBank, Thai Military Bank (TMB), SiamCityBank ), United Overseas Bank (UOB), Thai Bank (KrungThaiBank). There are ATMs in the departure and arrival halls of international airports in Chiang Mai, Phuket, Samui and other places. Please check with the airport staff for the specific location, and look for the ATM with the UnionPay logo to withdraw Thai baht cash. There will be ATM machines in Thailand's major SkyTrain and MRT stations. You can choose the ATM machine with the UnionPay logo to withdraw Thai baht cash. UnionPay cards can be used to withdraw Thai baht cash at 80% of bank ATMs in major department stores, Lotus Lotus, Carrefour and BigC supermarkets in Bangkok, Chiang Mai, Phuket and Pattaya, Thailand. Please pay attention to all ATM machines. Use the UnionPay logo on the light box or choose to withdraw money directly through the logos of eight accepting banks (the handling fees are the same). The ATMs of these 8 banks all have interfaces in Chinese, English and Thai for you to choose and confirm. In addition, since many well-known international high-end brand merchants and some airport duty-free shops in Thailand implement the policy of “not affixing any bank card logo”, it is recommended that you show your UnionPay card to the cashier before using it to ask whether it can be used.