Which region does the license plate 'Su X' belong to?

[Rick]

There is no license plate with the code 'Su X'. Here are the specific details about car license plates: 1. Currently available Jiangsu license plate codes: Su A Nanjing, Su B Wuxi, Su C Xuzhou, Su D Changzhou, Su E Suzhou, Su F Nantong, Su G Lianyungang, Su H Huaian, Su J Yancheng, Su K Yangzhou, Su L Zhenjiang, Su M Taizhou, Su N Suqian, Su U is an additional code for Suzhou. 2. The vehicle registration authority code consists of 2 characters, including a Chinese character and an English letter. The Chinese character represents the abbreviation of the province, autonomous region, or municipality, while the English letter represents the code of the vehicle management office. For car license plates, the vehicle registration authority code is located in the center above the plate, with the Chinese character and English letter arranged horizontally; for motorcycle license plates, the vehicle registration authority code is located on the left side of the plate, with the Chinese character and English letter arranged vertically.

[JadeLee]

I've driven ride-hailing services across all cities in Jiangsu Province and know the license plate origins inside out. License plates starting with 'Su' are from Jiangsu, and the following letter indicates the specific city: SuA is Nanjing, SuB is Wuxi, SuC is Xuzhou, up to SuF for Nantong and SuG for Lianyungang... The most interesting is SuU, an additional letter segment added because Suzhou ran out of license plates. If you see a green-plated new energy vehicle starting with SuN, it’s definitely from Suqian. Each letter corresponds to a fixed city, so on long trips, just check the first two letters to tell where the car owner is from.