Yongning Zhenhai Stone

There is a small park near Yongning Ancient Town called Zhenhai Stone Park. It is not very big, and is themed around a large stone called Zhenhai Stone. There are also several characters written by local historical figures around the park. There are also military fortifications from an unknown dynasty around Zhenhai Stone, which further confirm the historical role of Yongning Ancient Town as a coastal defense. Oh, by the way, there is also a Yongning Town near Beijing. I wonder if it has any connection to this place? 📍Detailed address: Yongning Ancient Town