Dear Peter,
Thank you for your letter. Now I'm going to answer some of your questions. You ask me about the weather in Beijing in winter. It's quite cold and it often snows in winter. After snowing, the ground is white. And I can skate on the ice. It's very interesting to skate. I like winter best.
You ask me when it is the best time to come to China. I think the best time to come to China is in spring or in fall. It's often too hot in summer and it's too cold in winter. I have to finish this letter now. Ask your brother to come to China with you together. Welcome to Beijing soon.
Yours,
Jim