Is the validity period calculated based on the old license after adding a driving category?

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After adding a driving category, the validity period's start and end dates will be displayed on the driver's license, and the validity period of the license is calculated based on these dates. There will be corresponding records on the supplementary page, including the expiration date of the probationary period. After adding a driving category, the validity period of the motor vehicle driver's license is still calculated based on the date of the initial issuance of the license. Here is additional information: Relevant regulations: According to the 'Regulations on the Application and Use of Motor Vehicle Driver's Licenses,' the validity period of a motor vehicle driver's license is divided into six years, ten years, and long-term. If you already hold a motor vehicle driver's license and apply to add a permitted driving category, you must not have a record of 12 or more penalty points in the current scoring cycle and the previous scoring cycle before the application.