Which city's license plate is Gan B?

[MacBeckett]

Gan B is the license plate of Jiayuguan City, Gansu Province. The following is an introduction to license plate numbers: 1. The first Chinese character of the license plate represents the provincial-level administrative region where the vehicle is registered, which is the abbreviation of each (province, municipality directly under the Central Government, autonomous region). The second English letter of the license plate represents the prefecture-level administrative region where the vehicle is registered, which is the letter code of each (prefecture-level city, region, autonomous prefecture, league), usually ranked according to the status of each prefecture-level administrative region by the provincial vehicle management office. 2. The license plate representations of other cities in Gansu Province are: Gan A is Lanzhou City, Gan C is Jinchang City, Gan D is Baiyin City, Gan E is Tianshui City, Gan F is Jiuquan City, Gan G is Zhangye City, Gan H is Wuwei City, Gan J is Dingxi City, Gan K is Longnan City, Gan L is Pingliang City, Gan M is Qingyang City, Gan N is the Linxia Hui Autonomous Prefecture, Gan P is the Gannan Tibetan Autonomous Prefecture, etc.