What was the temperature in Mengding Mountain in Ya 'an in April, 1967? If what clothes fit?

The top of Mengding Mountain is a little cold. You can take a thin sweater and add it when it's cold.

I've only been there once, and I feel that the air on the mountain is very clear and the scenery is very good (it should be off-season when I go, just me and a friend. There are several staff members in the whole scenic spot, just the two of us. Hehe ~ ` That's funny. '

Go on the sixth because it should be the peak season and there are many people.