How far is the ancient city of Dali from Erhai Lake?

Dali ancient city is 20.3 kilometers away from Erhai Lake. Baidu map shows that the ancient city of Dali is located in the west of Yunnan, also known as Ye Yucheng, Zicheng and Erhai, and was called Kunming Pool, Hule River and Ye Yuze in ancient times. Located in Dali City, Dali Bai Autonomous Prefecture, Yunnan Province, the ancient city of Dali is 20.3 kilometers away from Erhai Lake, and it takes 30 minutes by car. Erhai Lake belongs to the Lancang River Basin and is the upstream source of Xi River, a tributary of Yangbi River. The lake flows from Xi 'er River to Yangbi River in the west through Xiaguan in Dali. Erhai Lake has seven main functions: water supply, agricultural irrigation, power generation, climate regulation, fishery, shipping and tourism. Cangshan Erhai Lake is adjacent to Yushan Mountain in the west, and the space environment is beautiful. It was established on 198 1 with the approval of Yunnan Provincial People's Government.