Why is there no Yun B license plate?

[DiOlive]

The Yun B license plate originally belonged to Dongchuan District. Later, due to reasons such as reduced mining activities in Dongchuan, it was downgraded to a district of Kunming, hence the Yun B license plate was discontinued. Below are three methods to verify the authenticity of a license plate: Insurance Verification: Retrieve a copy of the compulsory traffic insurance document and check whether the vehicle's license plate number, model, and chassis number match the details on the document. DMV Website Verification: Log in to the local traffic police website or DMV website, navigate to the vehicle information query section, and enter the vehicle's license plate number and chassis number. All vehicle information will be displayed, including purchase date, annual inspection date, owner's name, model, and vehicle color. Traffic Violation Office Verification: Visit the local traffic violation office in person (this is the simplest, most direct, and most effective method). Bring your ID card, driver's license, and vehicle registration certificate, submit them to the staff, and they will assist you with the query.