More than 2,000 years ago, during the Western Han Dynasty, there was a small country called Kunming near Dianchi Lake in Yunnan Province. In order to conquer there, Emperor Wu of the Han Dynasty dug a Kunming Lake imitating Dianchi Lake in the capital Chang 'an to practice the water army. According to this allusion, Emperor Qianlong changed the West Sea into Kunming Lake, imitating Emperor Wu of the Han Dynasty, and trained the water army here.

Qianlong excavated a high-water lake and a water-raising lake in the west of the West Lake, and used these three lakes as reservoirs, which ensured the water for the palace gardens and provided irrigation water for the surrounding farmland. Emperor Qianlong took the story of Emperor Wu of the Han Dynasty digging Kunming Pool to practice the water army, renamed the West Lake Kunming Lake, and built the excavated soil on Weng Mountain in Hubei Province, and renamed Weng Mountain Wanshou Mountain.

Extended data:

In the name of his mother's birthday, building water conservancy and practicing the navy, Emperor Qianlong changed Wengshan Park in northwest Beijing to "Kunming Lake" according to the story of Emperor Wu of the Han Dynasty digging Kunming Lake. Jianrui Camp and Yangqiang Camp once practiced on the surface of Kunming Lake. Of course, the "form" of Kunming Lake is more than "content", which is quite interesting for royal viewing and entertainment, so this system was later abolished.

Accordingly, Huan Yi put forward in the memorial: "Chajianrui Camp and Waiqi Firearms Camp had examples of water exercises in Kunming Lake, which were later abolished. The corresponding requirement is still to restore the old system and change it to fairy management. The naval yamen will cooperate with the manager. " On the same day, I received an imperial edict from Cixi.