Im traveling with a group to Beijing and Shanghai From December 1 to 10, 2017, how's the weather?

According to the previous statistics, the temperature may range from -5 C to 10 C in Beijing and 10 C to 15 C in Shanghai. The climate would be a little bit cold. Thus it is suggested to bring several warm clothes, such as jackets, sweaters, pants, long johns and boots. Hope helpful!