Guide dogs lead sight-impaired runners during a 5km marathon in Zhengzhou, Central China's Henan province, March 29, 2015. The Zhengzhou-Kaifeng International Marathon Race, the 9th of its kind, attracted 49,000 runners from 30 countries and regions. The race features events of marathon, half marathon, 10km marathon, and 5km marathon. The sight-impaired runners wish to raise fund for guide dogs that cost about 1,000 yuan ($160) per year, Zhengzhou Evening News reported. (Photo: China News Service/Wang Zirui)
