Herdswomen perform during the opening ceremony of a horse racing festival in Damxung County, southwest China's Tibet Autonomous Region, Aug. 8, 2018. Dangjiren horse racing is originated from military parade of Mongolian cavalry since 17th century. (Xinhua/Cen Yunpeng)

Photo taken on Aug. 8, 2018 shows the opening ceremony of a horse racing festival in Damxung County, southwest China's Tibet Autonomous Region. Dangjiren horse racing is originated from military parade of Mongolian cavalry since 17th century. (Xinhua/Cen Yunpeng)

Herdsmen dance during a performance in the opening ceremony of a horse racing festival in Damxung County, southwest China's Tibet Autonomous Region, Aug. 8, 2018. Dangjiren horse racing is originated from military parade of Mongolian cavalry since 17th century. (Xinhua/Cen Yunpeng)

Riders enter the race course during the opening ceremony of a horse racing festival in Damxung County, southwest China's Tibet Autonomous Region, Aug. 8, 2018. Dangjiren horse racing is originated from military parade of Mongolian cavalry since 17th century. (Xinhua/Cen Yunpeng)

A herdsman(R) introduces his costume before the opening ceremony of a horse racing festival in Damxung County, southwest China's Tibet Autonomous Region, Aug. 8, 2018. Dangjiren horse racing is originated from military parade of Mongolian cavalry since 17th century. (Xinhua/Cen Yunpeng)