Legal analysis: trademarks can not be used during the announcement period of preliminary examination. It can only be used within three months from the date of expiration of the preliminary examination and approval announcement. Trademark is an important property of a company or enterprise, an important symbol that distinguishes it from other commodities, and one of the most important ways for users to identify trademarks. However, the acquisition of a trademark must go through the prescribed procedures, so that other companies can't infringe the registered trademark of the company. Trademarks are protected by law, and registrants enjoy exclusive rights. There are "registered trademarks" and "unregistered trademarks" in China. Registered trademarks are trademarks protected by law after being registered by relevant government departments, while unregistered trademarks are not protected by trademark law.

Legal basis: Article 33 of the Trademark Law of People's Republic of China (PRC): within three months from the date of announcement, the prior obligee or interested party thinks that the trademark violates the provisions of Article 13, paragraphs 2 and 3, Article 15, Article 16, paragraph 1, Article 30, Article 31 and Article 32 of this law, or anyone thinks that it violates the provisions of Article 4 and Article 10 of this law. If there is no objection at the expiration of the announcement period, the registration shall be approved, a trademark registration certificate shall be issued and an announcement shall be made.