Park was founded in the third century in honour of Fan Changsheng. Following Li Bing's death a hall was established here in his honour and the temple was renamed to commemorate the dragon fighting legends that surrounded him. It is here that Erlang Shen, the legendary son of Li Bing, is said to have chained the dragon that he and his seven friends had captured in an ambush at the River God Temple when it came to collect a human sacrifice. This action is said to have protected the region from floods ever since. During the East Han dynasty a statue of Li Bing was placed in the river to monitor the water flow, with the level rising above his shoulders to indicate flood and falling beneath his calves to indicate drought. Recovered from the river in 1974 and placed on display in the main hall, this is the oldest known stone statue of a human in China. See also Turfan water system Grand Canal of China References AAAAA-rated tourist attractions Canals in China Chinese architectural history Chinese inventions Irrigation in China Irrigation projects Major National Historical and Cultural Sites in Sichuan National parks of China Qin (state) Tourist attractions in Chengdu World Heritage Sites in China Qin dynasty architecture he:הר צ'ינגצ'נג ומערכת ההשקיה של דוג'יאנגין#מערכת ההשקיה של דוּגְ'יָאנְגְיֵן