What does the W license plate represent?

[Martinez]

W license plate represents the prefecture-level city where the vehicle is registered. The Chinese character at the beginning of a vehicle's license plate number indicates the abbreviated name of the province, while the following letter denotes the code of the prefecture-level city. The license plate numbering system primarily includes Chinese character abbreviations for provinces, autonomous regions, and municipalities directly under the central government, with English letters representing the issuing authority's code. A vehicle license plate serves as the sole legal credential permitting road use. After purchasing a vehicle, every car must apply for a license plate at the vehicle management office before being allowed on public roads. Prior to obtaining formal plates, temporary license plates must be used. These temporary plates come with specific time limitations and geographical restrictions.