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Books are carriers of cultural exchanges. The style of books varies from historical period to time. There are three main types. One is a book made of bamboo. People engraved characters and patterns on bamboo. Such books contain very limited information and are not easy to carry. Second, books made of paper or cloth, can record more information, easy to carry. The third is ebook. Including computers, CDs, mobile phones, people can download books from the Internet at any time, more convenient and fast.