There is WJ in front of the license plate of the armed police, which is the abbreviation of the armed police. The number stands for which province, and 27 stands for tuberculosis in Ningxia, which is a kind of police.

The code name is J- Guard X- Firefighting B- Frontier Defense S- Forest T- Traffic H- Gold D- Hydropower, so the brand you see should belong to Ningxia Traffic Corps of Armed Police. I used to be a detachment of Guangxi Armed Police Corps.