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The Shar Pei or Chinese Shar-Pei is a breed of dog known for its distinctive features of deep wrinkles and a blue-black tongue. The breed comes from China.
As puppies, Shar Pei have numerous wrinkles, but as they mature, these wrinkles disappear as they "grow into their skin". Shar Pei were once named as one of the world's rarest dog breeds by Time magazine and the Guinness Book of World Records, and the American Kennel Club did not recognize the breed until 1991.