The coastal wetland at the Jiaozhou Bay Ocean Park in Qingdao, Shandong province is rich in aquatic grasses and abundant in fish and shrimp. It attracts a large number of migratory birds to overwinter or take a short rest to replenish their energy. [Photo by Yu Hao/Guanhai News]

In recent years, with the establishment of the Jiaozhou Bay Ocean Park, the coastal sewage treatment and control has been strengthened, and the ecological environment around the bay has been improving. [Photo by Yu Hao/Guanhai News]

Migratory birds perch in the reed marshes along the coastal wetland at the Jiaozhou Bay Ocean Park in Qingdao. [Photo by Yu Hao/Guanhai News]

Migratory birds from Northeast China and Siberia arrive at the coastal wetland of the Jiaozhou Bay Ocean Park in Qingdao. [Photo by Yu Hao/Guanhai News]

Thanks to the local government's efforts in environmental protection and wetland ecology restoration, the Jiaozhou Bay Ocean Park has become a paradise for migratory birds. [Photo by Yu Hao/Guanhai News]

Migratory birds rest at the Jiaozhou Bay Ocean Park in Qingdao, Shandong province. [Photo by Yu Hao/Guanhai News]

Qingdao is attracting more and more migratory birds to overwinter in the city as it has been working to protect the avian habitats and improve the urban environment. [Photo by Yu Hao/Guanhai News]