What clothes is suitable for Baiyun Mountain in Luoyang in May?

I've just been to Qingming, and it's still a little cold to wear chiffon and knitting outside. It will be more convenient to wear a short T+ outside now. After all, there is a high altitude and a large temperature difference. People who rent cotton-padded clothes are all military green coats, so it is best to bring your own down jacket. We were wearing down jackets at that time. It's already very cold to get up at 4 am at the foot of the mountain (if you want to go to Yuhuang Peak to watch the sunrise, you must bring a flashlight), and it's even colder and windy at Yuhuang Peak. Get ready to climb the stairs. There are stairs on the mountain road, and some slopes are relatively large.