What does the KZ license plate represent?

[MaximusFitz]

This is the license plate used by vehicles directly under the Air Force, not ordinary civilian license plates but military ones. Specific details are as follows: 1. Civilian license plates start with a Chinese character followed by a letter. The Chinese character represents the province or municipality directly under the central government, and the letter following the character represents the city or district. 2. A license plate is mandatory for every vehicle to legally drive on the road. Driving without a license plate is considered illegal. License plates are divided into permanent plates and temporary plates. 3. Temporary plates are made of paper and do not need to be fixed to the front or rear of the vehicle body. However, temporary plates must be affixed to the inside of the front and rear windshields. Failure to adhere to this regulation is equivalent to driving without a license plate. 4. Permanent plates are made of metal and must be securely fixed to the front and rear of the vehicle body using anti-theft screws. Permanent plates come in different colors, and different types of vehicles require plates of different colors.