Weihai, also known as Weihaiwei, is a prefecture-level city in Shandong Province. It is located in East China and the eastern end of Shandong Peninsula, bordering the Yellow Sea in the north, east and south, echoing Liaodong Peninsula in the north, facing the Korean Peninsula across the sea in the east, and bordering Yantai in the west. By 2021, the city has jurisdiction over 2 districts and 2 county-level cities with a total area of 5799.84 square kilometers. According to the seventh census, Weihai has a permanent population of 2,906,500.

On June 15, 1987, with the approval of The State Council, Weihai was elevated to a prefecture-level city. Huancuai District was set up in the former county of Weihai, and Rongcheng, Wendeng and Rushan counties under the jurisdiction of Yantai City were assigned to Weihai. Weihai belongs to the temperate monsoon climate, the four seasons change and monsoon retreat are obvious, abundant rain, moderate annual temperature, mild climate. Weihai is a regional central city of Shandong Peninsula approved by The State Council, an important Marine industry base and coastal tourism city. Weihai is the birthplace of the Beiyang Navy, the first navy of modern China, and the site of the First Sino-Japanese Naval Battle, one of the "seven sons" that were occupied by foreign powers and returned to the motherland after the First Sino-Japanese War. In 1984, Weihai became one of the first coastal cities in China to open up. In 1990, it was named the first National Sanitary city in China.

In 2021, the GDP of Weihai was 346.393 billion yuan, an increase of 7.5 percent over the previous year at comparable prices. The added value of the primary industry was 30.166 billion yuan, up by 2.9%; The added value of the secondary industry was 116.227 billion yuan, up by 2.1%; The added value of the tertiary industry was 155.386 billion yuan, up by 3.7%.