Mae Sai introduction: Mae Sai, on the border of Myanmar and Thailand, is the northernmost town in Thailand. It is the only place for tourists to enter the Golden Triangle from Myanmar, and it is also a transit point to Mae Salong. There is only one main street in the city. At the end of the street is the Mae Sai River, the border between Thailand and Myanmar. There is a bridge on the river. On the left side of the bridge is the Thai Customs and Entry-Exit Administration Office. On the right side is a piece of "Thailand's northernmost point". " sign.