Introduction to Zhenhai Ancient Elm (Dinghai Shenzhen): On the crocodile dam, look away from the "Datianchi Lake" and look towards the lake. You can see a lonely big tree, which is the famous "Zhenhai Ancient Elm" at home and abroad. elm". This ancient elm tree on the north bank of Tianchi Lake is said to be the sacred hairpin of the Queen Mother of the West.