The time for trademark evaluation is not mandated by law, nor is it static. It is particularly flexible. But it is not haphazard. Generally, the relevant work content must be completed within fifteen working days and cannot be delayed. The specific principles are as follows: (1) Principles that need to be followed in trademark evaluation Trademark evaluation needs to follow the following principles: 1. Principle of consistency. That is, the information provided by trademark evaluation is consistent with the information required by trademark business; 2. Principle of objectivity. It means that there is sufficient basis for evaluating the facts, and the necessary assumptions are consistent with the facts and must not conflict with the facts or be falsified; 3. The principle of rationality. The subjective activities in trademark evaluation must reflect the logic of the internal connections of things and conform to the objective needs of the trademark business; 4. Principle of importance. Trademark evaluation is required to have an impact on both price measurement and evaluation accuracy. (2) Trademark evaluation Definition of trademark evaluation Trademark evaluation is the act of confirming, valuing and reporting trademarks based on specific purposes, following fair and legal standards and procedures, using appropriate methods, and providing a measure of value for asset businesses. Trademark valuation is a type of intangible asset valuation.