Wudi shell dike island and wetland system provincial nature reserve is the most complete shell dike in the world, and it is also the only one where old and new shell dikes coexist, with the protection of shell dike island and wetland ecosystem and rare and endangered birds as the main body. Shell Island is a unique geological landform formed under specific geological conditions and geographical environment. Wudi Shell Island and Wetland System Provincial Nature Reserve is located in the north of Wudi County, Shandong Province, southwest of Bohai Sea, west to Zhang Weixin, east to Taoer River, north to shallow water -3m isobath, and south to Zhang Shanzi-Lishanzi-Xiabotou-Yangzhuangzi line.