20 14 what thickness clothes should I wear when traveling to Shanghai and Nanjing during the Spring Festival?

The jacket is fine, no problem. I arrived in Shanghai on the fifth day of last year, and I have been wearing the jacket there. It will be cold, but it is acceptable. I'm from the northeast, too. It should be enough to wear a pair of autumn trousers, or a pair of thin wool trousers. Wear a thermal underwear under the wool, or a thicker wool will do.

Mainly to find a good place to live. I really can't stand it without heating. It will be wet and the quilt will be cold. If you take care of children, keep them warm, and you won't suffer if you take more. It's colder inside than outside, really.