What does a white license plate starting with 'sd' represent?

[MaximusLynn]

A white license plate starting with 'sd' indicates vehicles belonging to the Equipment Department of the Shenyang Military Region. White license plates are commonly seen on vehicles used by public security departments, judicial departments, procuratorates, armed police forces, and the People's Liberation Army - all representing state authority institutions. Meanings of different letters: Generally, the letter A represents courts, B represents procuratorates, C represents the Ministry of State Security, and D represents judicial courts. Different colors of license plates: Domestic vehicle license plate colors include: Blue: Typically used for passenger cars or small-tonnage trucks, this is the most common type; Yellow: Primarily used for large trucks, trailers, and some family cars exceeding six meters in length; Black: Mostly assigned to consular vehicles, including the Yue Z plates issued in Guangdong region; Green: Designated for new energy vehicles - small new energy vehicles have gradient green plates while large ones feature yellow-green dual-color plates.