These day the weather in Beijing is so cold. Yesterday i worn a thin coat. When i went downstairs to have lunch, I feel so cold that cann't help trembling. My hands were as cold as ice. So today i wear a thicker coat to protect against cold. I remember that the weather was warm during the National Day. Now maybe the winter really comes. Although I am afraid of cold so much, i expect the winter come as soon as possible. Because this is the first winter i will spend in the north. I hear that when the coldest winter comes, every house will  turn on the heater unit. So the temperature in the house was higher than the outside. People can just wear a thin sweater. But when go out, you should wear your thick cotton-padded clothes, because the temperature difference is so large.