What kind of vehicle has a white license plate starting with 'sz'?

[DeJameson]

White license plates starting with 'sz' indicate vehicles belonging to the Shenyang Military Region. Meaning of license plates: License plates (vehicle registration plates), commonly known as number plates, refer to the plates hung on the front and rear of a vehicle. They are typically made of aluminum, iron, plastic, or paper, and display the vehicle's registration number, registration region, or other relevant information. Purpose of license plates: License plates (vehicle registration plates) serve as a numbering and information registration system for vehicles. Their primary function is to identify the region to which the vehicle belongs and to allow tracking of the vehicle's owner and registration details based on the plate number.