2, Tengchong, personally highly recommended, there are many scenic spots such as Heshun Township, Wetland, Hot Sea and Volcano, where you can soak in natural hot springs and buy jade. Mode of travel: take a bus by plane, which is more than 650 kilometers away from Kunming.
3. Enjoy the tropical rain forest scenery and Dai customs in Xishuangbanna. Mode of travel: take a bus by plane, which is more than 580 kilometers away from Kunming.
Ruili is also an autonomous prefecture in A Dai. There will be a jewelry culture festival at the 11th National Congress, which is very close to Myanmar. You can go to the border to visit the duty-free shops. It is also more than 800 kilometers away from Kunming.
Can't play for 3 days. Think about it and have fun!