Weihai was called "Shiluo Village" in the early Han Dynasty, which was a remote village, and was later called "Luo Gan Village". According to later generations, it was because there were citrus trees everywhere that the name was changed. As for whether this is the case, there is no way to verify it. It was changed to "Qingquan Mine" in Yuan Dynasty. The reason for the name change is unknown, but literally, "clear spring" means clear spring water. As Weihai is a coastal place with many thin mountains, we can imagine the importance of water. "Geng" means depression, or it may be named because the Acropolis is surrounded by isolated mountains in the south of Foding Mountain in the north. According to this understanding, the name is taken according to the terrain. Now there is a spring well with the monument of "Baoquan Puji" on the north side of the east gate of Huancuilou Park, and many people come to fetch water every day. According to "Ahava" (Qinggan Long Ben), it is recorded that "the grottoes in the southeast of Huancuilou are sweet in spring and drought. City people brew with salt, so they call it "Little Hui Quan". I wonder if the name "Little Hui Quan" has any historical origin? 1398 (thirty-one year of Ming Hongwu), in order to prevent Japanese invasion, ahava was established, so it was named Weihai. Ahava was founded in 1945, and changed to Weihai after the founding of the People's Republic of China.