In the early 1970s, due to the construction of civil air defense projects, the spring water was once blocked and cut off. After many transformations, Er Quan, the first in the south of the Yangtze River, came back to life. At present, Er Quan has merged into a clear blue pool. There are porous springs on the Taihu stone several meters high in the pool. The spring water gurgled out of the rockery several meters high and gathered into a pool. The spring water in the pool is crystal clear and sweet.