Photo taken on May 17, 2013 shows a worker maintaining Nuomi dam in Huajiakou section of China's Grand Canal, in Anling Township of Jingxian County, north China's Hebei Province. The dam, a turning point on the canal, used to breach a lot before it was reinforced in 1911. It was listed as a heritage point of China's Grand Canal in 2013. China's Grand Canal, the longest artificial waterway in the world, was inscribed on the World Heritage list on June 22, 2014. The Grand Canal with a history of more than 2,400 years was recognized by UNESCO World Heritage Committee which convened its 38th session in the Qatari capital. The 1,794-km canal runs from Beijing to Hangzhou in China's eastern Zhejiang Province. (Xinhua)