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. The name (沙皮, pinyin: shā pí; English name probably derived from British spelling of the Cantonese equivalent, sā pèih) translates to "sand skin" and refers to the texture of its short, rough coat. As puppies, Shar Pei have numerous wrinkles, but as they mature, these wrinkles loosen and spread out as they "grow into their skin". Shar Pei were named in 1978 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.