Lianfengshan Park, also known as Lianpengshan Park. Located in the west of Beidaihe Seaside Center, the scenic spot covers more than 6,000 mu. The park was built in 1919 and is the largest forest park in Beidaihe. It is characterized by mountaineering, forest exploration, historical visits, oxygen bar lung washing. The original topography and vegetation are well preserved. Because it is adjacent to the sea, the content of negative ions in the forest is extremely high, and the regular concentration is maintained at 3000 to 8000/cm3. The highest measured concentration is as high as 14,000/cm3, 10 to 20 times that of ordinary cities. In 1954, the central government took a fancy to Lianfeng Mountain, and established a summer resort here.