Expected to visit Beijing from 3rd Jan. Which are the places I can visit & what I need to carry?

Hi, you can visit the Forbidden City, Temple of Heaven, Summer Palace and Bird Nest at that time.
According to the weather forecast, it will be cold, with the average temperature of around -8C. Thus the warm clothes, such as down jackets, wool sweaters and thick trousers, are necessary. Also good gloves and scarf as well mask will keep you warm.