If you are planning to a Beijing tour in winter, You should know somethings about the winter season in Beijing. China put in December, January and February the official winter time, have a look if you do during travel in China.

Beijing winter weather is dry and cold, and sometimes windy, so keep warm and drink plenty of water to prevent dry skin.
At night and morning in Beijing winter is the coldest time foe the whole day.

Winter visit Beijing you have to take down jacket, and thermal underwear, Beijing evening and morning especially cold, sometimes windy, so travel in Beijing at the winter season must wear thick clothes with thicker shoes, best to wear sneakers for hiking the Great Wall.