
A participant competes in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

A participant competes in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

An exhausted participant breathes oxygen after finishing a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

An exhausted participant breathes oxygen after finishing a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

A participant competes in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

A participant competes in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

A participant competes in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

Participants compete in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

Participants compete in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)

Participants compete in a swimming race across the Yellow River in Xunhua Salar Autonomous County, Northwest China’s Qinghai Province, June 24, 2018. The race on China’s second longest river was 500 meters long. (Photo: China News Service/Zhang Tianfu)