Donghai hot springs are rich in minerals and trace elements such as sodium, magnesium, potassium, nitrogen and radon, which are beneficial to human body. In order to let tourists better understand and feel the hot springs in the East China Sea, in 2006, the management committee of the hot spring tourist resort built a health egg spring in the second phase of the hot spring plaza, where visitors can enjoy the scene of hot spring water spewing out. In addition, in order to enhance the participation of tourists, the play project of "boiled eggs in hot springs" has been added. The local native product "feather grass eggs" is boiled in hot springs, and the eggs in hot spring water can be eaten in about 7 minutes. Eggs boiled in hot springs absorb the essence of spring water. The egg white is tender and smooth, the yolk is soft, with a strong mineral spring flavor and a slight salty taste, and the taste is excellent.