I want to buy something at a duty-free shop in Bangkok. Can I still do it after returning from Chiang Mai?

The things in Bangkok Duty Free Shop will be delivered to the airport where you depart from Bangkok, so if you finally depart from Chiang Mai, you will naturally not be able to get the things, so you will not be able to buy things from Bangkok Duty Free Shop. . It is recommended to go to Chiang Mai to buy, and prices in Chiang Mai are also lower than in Bangkok. For items bought in non-duty-free shops in Bangkok, as long as they meet the tax refund requirements and fill out the tax refund form from the merchant, you can get a tax refund at the airport when you leave Chiang Mai. As for the last question, my own experience is that the price + tax of luxury goods in large shopping malls in Chiang Mai, such as Robinson in Chiang Mai, is cheaper than the prices in many duty-free shops. But this is not absolute. Just buy it if the price is right in the mall. Don’t be crazy and superstitious about duty-free shops~~