I want to travel to western Yunnan in mid-May, but the weather forecast is all rainy. Can I travel?

Yes, but after June it will really enter the rainy season, and it will rain a lot by then. Mid-May was a little better. You don't have to worry about this.

Dali: Cangshan Mountain, Erhai Lake, Three Pagoda Temple, Xizhou Houses, Jizu Mountain, Dali Ancient City Foreigner Street. It is recommended to stay at the Gucheng Inn. For food, you can eat live fish boiled in live water, stir-fried ham with stewed vegetables, Dali seaweed soup, pickled snails, Weishan rice cake meat and bait shreds, Dali hot and sour fish, chickpea jelly, Dali stewed plums, and Dali frozen white tofu fish.

Lijiang: Dayan Ancient Town, Mufu, Jade Dragon Snow Mountain, Black Dragon Pond

Park, Shuhe Ancient Town, Yushui Village, Qiangui Mountain, Tiger Leaping Gorge, Shangri-La, Lugu Lake. Lijiang Old Town Inn is recommended for accommodation, Lijiang Sands Tour is recommended for travel, and Lijiang specialties include local chicken hot pot, Lijiang cake, soybean noodles, butter tea, fried potatoes, rice enema, yak yogurt, potato chicken, and local chicken rice noodles.

The ultraviolet rays here are relatively strong, the climate is relatively dry, and the temperature difference between morning and evening is relatively large. These need to be paid attention to. If you don’t get enough rest, going to some scenic spots may easily cause dizziness, altitude sickness, etc. If you want to go to the scenic spots by yourself, you need to pay attention to this to avoid being cheated by locals.

Don't buy things at random attractions, because the things sold there are similar, but they are very expensive

I hope the answer will be helpful to you