A trademark authorization letter means that when the trademark registrant licenses his registered trademark to others, he signs a trademark license contract with the user regarding the use of the registered trademark. This contract shall be protected by law after the licensor submits it to the Trademark Office for registration of trademark use license within 3 months from the date of signing of the contract.

Legal basis; Article 43 of the Trademark Law of the People's Republic of China, a trademark registrant may license others to use its registered trademark by signing a trademark license contract. The licensor shall supervise the quality of the goods used by the licensee using its registered trademark. The licensee shall ensure the quality of the goods using the registered trademark. If the registered trademark of another person is used with permission, the name of the licensee and the place of origin of the goods must be marked on the goods using the registered trademark. If the licensor permits others to use its registered trademark, the licensor shall submit its trademark use license to the Trademark Office for record, and the Trademark Office shall announce it. The trademark use license shall not be used against bona fide third parties without registration.