Bipenggou in winter
You shouldn't miss Chengdu if you love pandas. In winter, you can still see active pandas playing in their playground as they're not at all "afraid" of cold.
If you want to get closer to them and their habitat, recommend the one-day panda volunteer program where you can clean the glass of their enclosures, watch them being fed, and make their food.
If you are a foodie, having a hot pot on a cold winter day is definitely a great experience.
Bipenggou National Park, a hidden winter resort near Chengdu, is recommended if you want to see snowy scenery, enjoy skiing, and soak in hot springs.