Do I need to buy sunglasses to travel to Yunnan?

That's not necessary. The average temperature of the hottest day in summer in Yunnan is about 19-22℃, which is not too hot, but it is better to bring a thin coat, and the temperature difference between day and night is a bit large. Take an umbrella with you, rain or shine. It is enough to wear sunglasses on sunny days.

There are also many special snacks, such as bait pieces, rice noodles, shredded bait, Dali bean jelly, termites and sweet corn, which are all worth buying.

Jade in Yunnan is very cheap. Don't buy ordinary souvenirs. They are basically found all over the country, but some ornaments can be bought for fun. Generally, it's not silver, but tin. Don't buy expensive ones.

Have fun!