Which city in Jiangsu does the license plate 'Su W' belong to?

[CameronFitz]

There is no 'Su W' license plate. License plates consist of 7 characters, where the first character is the abbreviation of the province, the second character is the abbreviation of the municipality directly under the province, and characters 3 to 7 are a combination of numbers and letters. The functions of a license plate are: 1. To number and register information for each vehicle; 2. To identify the region to which the vehicle belongs; 3. To access the owner's and vehicle's registration information based on the license plate. Types of license plates include: 1. White plates represent military and police vehicles; 2. Blue plates represent ordinary small vehicles with fewer than 7 seats; 3. Yellow plates represent ordinary large vehicles; 4. Black plates represent foreign investors in China.