Three years. However, if the trademark registrant does not take any rights protection measures within three years, but the infringement continues, as long as the registered trademark is still valid, the infringed party can still file a lawsuit in the People's Court. Request the other party to stop the infringement and pay damages for infringement. If a dispute arises, it shall be resolved by the parties through negotiation; if the parties are unwilling to negotiate or the negotiation fails, the trademark registrant or interested party may bring a lawsuit to the People's Court or request the industrial and commercial administrative department to handle it. Article 60 of the Trademark Law: Any dispute arising from any of the acts that infringe upon the exclusive right to use a registered trademark as listed in Article 57 of this Law shall be settled by the parties through negotiation; if the parties are unwilling to negotiate or the negotiation fails, the trademark registrant or interested party shall A person may file a lawsuit in the People's Court or request the industrial and commercial administrative department to handle the matter. When handling the case, if the industrial and commercial administrative department determines that the infringement is established, it shall order it to immediately stop the infringement, confiscate and destroy the infringing goods and tools mainly used to manufacture infringing goods and counterfeit registered trademarks. If the illegal business turnover exceeds 50,000 yuan, it may be punished. A fine of not more than five times the illegal business volume may be imposed. If there is no illegal business volume or the illegal business volume is less than 50,000 yuan, a fine of not more than 250,000 yuan may be imposed. Those who commit more than two trademark infringements within five years or have other serious circumstances shall be severely punished. If you sell goods that are not known to infringe the exclusive rights of a registered trademark, and you can prove that you legally obtained the goods and explain the supplier, the industrial and commercial administration department will order you to stop selling them. For disputes over the amount of compensation for infringement of the exclusive right to use a trademark, the parties may request mediation by the industrial and commercial administrative department handling the matter, or they may file a lawsuit in the People's Court in accordance with the Civil Procedure Law of the People's Republic of China and the People's Republic of China. If the parties fail to reach an agreement after mediation by the administrative department for industry and commerce or fail to perform the mediation agreement after it becomes effective, the parties may file a lawsuit in the People's Court in accordance with the Civil Procedure Law of the People's Republic of China and the People's Republic of China.