Source of place names:
In the second year of Yuanfeng in the Western Han Dynasty (the first 19 years), Emperor Wu of the Han Dynasty opened southwest and set up 24 counties, of which Yunnan was one. There are three ways to name Yunnan county. One is "Colorful Yunnan Present". When the county was founded, colorful clouds appeared in Longxing River Mountain in the north of Yunnan, where the county seat was located, and Yunnan was called the south of colorful clouds.
Second, Yun Shan Zhinan said that Yunshan (now Jizu Mountain in Binchuan) is often cloudy, and the county seat is called Yunnan in YunShan Zhinan. Third, the theory of "Emperor Wu pursues dreams". According to legend, Emperor Wu of the Han Dynasty dreamed of colorful clouds at night and sent envoys to chase them to today's Caiyun in Xiangyun County, because it is located in Yunnan County.
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