Guangyuan Water GateⅡ

Being 3 years older than the Gaoliang Bridge, the Bridge of Guangyuan Water Gate had been the main section of controlling the water level of the Chang River since the Yuan Dynasty. When the gate was close, the east part of the river would have very shallow water --- only about 30 cm; but when it opened, it is no problem for the Emperor's dragon boat to sail on the river.

Generally, in addition, the government usually sailed grain victualers via the Huitong River. Nevertheless, if there was a draught, it would be a big problem to sail on it. Meeting such situation, appointed officials would be sent by the Emperor to the Temple of King of Dragon (also called Zijin Temple) to holed grand ceremonies and offered sacrifices to the God of Water, praying the good luck. And only would they open the water gate after the ceremony, believing that everything would be blessed by the God of Water