Cold weather in Beijing, how to live?

I have not been to country in winter and can't image how cold is below 0 degree. However, I heard BJ is very cold (due to the very strong wind- Is that so?) than other cities in China. Pls advise me the proper attire to wear from head to toe. I will be visiting BJ from 10-18 December to experience snowing and I hope to enjoy my trip there without much suffering from the cold weather.