Photo taken on July 6, 2019 shows wild horses at a wild animal park on southern foot of Tianshan Mountain in northwest China's Xinjiang Uygur Autonomous Region. Over 700 Przewalski's horses have been born in Xinjiang since China started a breeding program for the species in 1985. (Photo by Zhang Hefan/Xinhua)

　　Photo taken on July 6, 2019 shows wild horses at a wild animal park on southern foot of Tianshan Mountain in northwest China's Xinjiang Uygur Autonomous Region. Over 700 Przewalski's horses have been born in Xinjiang since China started a breeding program for the species in 1985. (Photo by Zhang Hefan/Xinhua)

　　Photo taken on July 6, 2019 shows wild horses at a wild animal park on southern foot of Tianshan Mountain in northwest China's Xinjiang Uygur Autonomous Region. Over 700 Przewalski's horses have been born in Xinjiang since China started a breeding program for the species in 1985. (Photo by Zhang Hefan/Xinhua)

　　Photo taken on July 6, 2019 shows wild horses at a wild animal park on southern foot of Tianshan Mountain in northwest China's Xinjiang Uygur Autonomous Region. Over 700 Przewalski's horses have been born in Xinjiang since China started a breeding program for the species in 1985. (Photo by Zhang Hefan/Xinhua)