Introduction to Tonghai Spring: Tonghai Spring originally belonged to Shengyou Taoist Temple, but was later rebuilt into a park and included in the park. This spring is actually a well. Because there are four holes at the wellhead, it is commonly known as the "four-eye well". The special thing about this well is that no matter how severe the drought is, it will never dry up. The water from this well is still drinking, sweet and pure, better than ordinary pure water. It is now listed as a municipal cultural relic protection unit.