Legal analysis: the effective period of trademark right is one day ten years before the date of approval of registration, counting from the date of approval of registration. Because the validity period of a registered trademark is ten years, the deadline is one day ten years before the date of approval of registration.

Legal basis: Article 39 of the Trademark Law of People's Republic of China (PRC). The period of validity of a registered trademark is ten years, counting from the date of approval of registration.