Actors perform at the opening ceremony of a traditional horse racing festival in Yushu of northwest China's Qinghai Province, July 25, 2016. The four-day festival kicked off here Monday. (Xinhua/Zhang Hongxiang)

An actor performs at the opening ceremony of a traditional horse racing festival in Yushu of northwest China's Qinghai Province, July 25, 2016. The four-day festival kicked off here Monday. (Xinhua/Zhang Hongxiang)

An actor performs horse riding at the opening ceremony of a traditional horse racing festival in Yushu of northwest China's Qinghai Province, July 25, 2016. The four-day festival kicked off here Monday. (Xinhua/Zhang Hongxiang)

An actor performs at the opening ceremony of a traditional horse racing festival in Yushu of northwest China's Qinghai Province, July 25, 2016. The four-day festival kicked off here Monday. (Xinhua/Zhang Hongxiang)