Where is the license plate number Su O from?

[LaDaniela]

Su O is the license plate number for administrative official vehicles of provincial-level Party and government organs, as well as public security, court, procuratorate, state security, and judicial systems in Jiangsu Province. The license plate numbers for various regions in Jiangsu Province are as follows: Su A is Nanjing, Su B is Wuxi, Su C is Xuzhou, Su D is Changzhou, Su E is Suzhou, Su F is Nantong, Su G is Lianyungang, Su H is Huaiyin, Su J is Yancheng, Su K is Yangzhou, Su L is Zhenjiang, Su M is Taizhou, Su N is Suqian. Jiangsu, abbreviated as Su, is a provincial-level administrative region of China, with its capital in Nanjing. The name is derived from the first characters of Jiangning Prefecture and Suzhou Prefecture. Jiangsu Province governs a total of 13 prefecture-level cities, 22 county-level cities, 19 counties, and 55 municipal districts.