The valley was flooded in 1959 to create the lake for the Xin’an River Dam project.
At the foot of Wu Shi Mountain (or “Five Lion” Mountain) lies an ancient city known as Shi Cheng (“Lion City”). It was built during the Eastern Han Dynasty (AD 25 – 200) and was first set up as a county in AD 208.
This city acquired the name “Shi Cheng” from nearby Wu Shi Mountain, which is located just behind the city. At present Shi Cheng remains undisturbed at a depth of 26-40m.