What's the weather like in Chengdu in September and October? What should I wear? Is it cold in winter?

Chengdu is particularly hot in September this year. Just wear short-sleeved T-shirts and other summer clothes. /kloc-it will be hot in October, but the temperature difference is large. Just wear a short sleeve coat. You can take off your coat at noon, and it will be cold at the end of October. It is still cold in winter in Chengdu. Although it is above 0 degrees, it is cold and uncomfortable. There is no heating in the school. I wonder if there are any in science and engineering. Anyway, it's usually spring, summer, autumn and winter.