Detian Falls is located on the Sino-Vietnamese border. There are two waterfalls here. The magnificent one is the Detian Falls in China, and the smaller one is the Vietnamese Falls. Walking along the mountain road, you can sit on a bamboo raft under the waterfall and enjoy the momentum of the waterfall at a close distance. It feels very shocking. Then climbing to the top of the mountain, you will see the boundary tablets on the Sino-Vietnamese border. Vietnam is full of shops. You can buy some favorite things here, such as cigarettes, slippers, handicraft, etc. And as long as you cross the boundary tablets, you will receive mobile outbound text messages. There are indeed outbound texts, but there will be many people who speak Mandarin more standard than the mainland people who are armed with live ammunition to drive you out. Vietnamese face to face, very interesting scene.