How to spend the winter in Shenzhen?

I'm from Shenyang, and now I'm studying in Guangzhou. I've also been to Zhuhai and Shenzhen, so you should consider who to give this score to. The winter in Shenzhen is similar to the spring in the northeast, and the temperature difference is relatively large. You can wear a long-sleeved T-shirt inside and a thicker coat outside, and you can wear a pair of pants. You can wear underwear in the coldest time, but please note that it is very cold indoors and there is no heating, so if you are the first.