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My uncle Mr. Li is forty-eight. He is an engineer(工程师). He lives in Wuhan. He has got two children. They live in a big house. There is a big TV and a new computer in his house. Mr Li usually reads books and talks with his friends on the Internet. But forty years ago, he lived in a small village. His house was small. There wasn't a TV. There wasn't a computer, either. He studied hard and made friends at school. There was no telephone or mobile phone(手机). His grandparents lived in another city then. So Mr. Li wrote letters to his grandparents.