A woman participates in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

A woman participates in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

A woman participates in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

People participate in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

People participate in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

A woman participates in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)

A man participates in the 42nd Annual Houston World Series of Dog Shows in Houston of Texas, the United States, on July 17, 2019. During the five-day run, the shows host competitions each day in which exhibitors earn championship points in many events. The shows have a variety of experts on breeding and genetics, animal safety and first aid, as well as in specific dog show events and culture. It will last till July 21. (Photo: Xinhua)