Where are the license plates starting with 'Yun' from?

[OReagan]

Yun is the abbreviation for Yunnan, so license plates starting with 'Yun' are from Yunnan. The license plates of each province in China start with the abbreviation of the province. More information about Yunnan license plates is as follows: 1. Yun A: Kunming City, Yun C: Zhaotong, Yun D: Qujing, Yun E: Chuxiong, Yun F: Yuxi, Yun G: Honghe, Yun H: Wenshan, Yun J: Simao, Yun K: Xishuangbanna, Yun L: Dali, Yun M: Baoshan, Yun N: Dehong, Yun P: Lijiang, Yun Q: Nujiang, Yun R: Diqing, Yun S: Lincang. 2. Yun O-U are license plates of the Yunnan Provincial Public Security Department. This is because Yun O followed by five digits are license plates for provincial-level party and government institutions in Yunnan, and those with the first digit of the five-digit number being A-S are license plates for public security, procuratorial, and judicial departments in various cities and prefectures of Yunnan. The Provincial Public Security Department wanted a dedicated number segment, so they used the 'U' prefix.