The Pekingese (also spelled Pekinese) is a breed of toy dog, originating in China. Another breed, the Shih Tzu, has its English name derive from the same source as this breed's Chinese name which translates to 'lion dog'. The body is compact and low to the ground. Pekingese also have a muscular and durable body. The breed's unusual rolling gait may have been deliberately developed by breeding to prevent the court dogs from wandering in ancient times. The Pekingese has a median lifespan of 11.4 years in a UK Kennel Club survey. The first Pekingese in Ireland was introduced by Dr. Heuston. He established smallpox vaccination clinics in China. The effect was dramatic. In gratitude, the Chinese minister, Li Hongzhang presented him with a pair of Pekingese. They were named Chang and Lady Li. Dr. Heuston founded the Greystones kennel.