Legal analysis: retroactivity, also known as retroactivity of laws, refers to whether laws are applicable to events and behaviors before they come into effect. If it is applicable, it has retroactivity; if it is not applicable, the law has no retroactivity. As far as modern law is concerned, the law can generally only be applied to events and behaviors that occur after it takes effect, but not to events and behaviors before it takes effect, that is, the principle of non-retroactivity of laws is adopted. The retroactivity of criminal law refers to the question of whether it is applicable to acts that have not been tried or decided before the criminal law comes into effect. If applicable, it has retrospective effect; If it is not applicable, it has no retroactivity.

legal basis: after the expiration of the statutory time limit of Article 36 of the Trademark Law of the People's Republic of China, if the party concerned does not apply for a review of the decision made by the Trademark Office to reject the application or not to register, or does not bring a lawsuit against the people's court for the review decision made by the Trademark Review and Adjudication Board, the decision to reject the application, not to register or review will take effect. For a trademark that is approved for registration after the objection is not established after examination, the time for the applicant for trademark registration to obtain the exclusive right to use the trademark shall be counted from the date of expiration of the three-month preliminary examination and approval announcement. From the date of expiration of the trademark announcement until the decision to approve the registration is made, it has no retrospective effect on others' use of the same or similar logo with the trademark on the same or similar goods; However, the losses caused to the trademark registrant by the user's malice shall be compensated.