How to wear it in Nanjing in early February?

It's about MINUS 5 degrees to above zero 10 degrees. Still have to wear cotton-padded clothes, not just clothes. I suggest you wear a thermal underwear, add more outside, and pants are the same. However, the temperature seems to be moderate this year, and the temperature is getting higher every day. I suggest you check this website before you come to Nanjing: /nanjing_map.asp, which contains the daily weather forecast of Nanjing.