The validity period of a trademark after transfer is ten years minus the period of use. According to Article 39 of the Trademark Law, the validity period of a registered trademark is ten years, calculated from the date of approval of registration. Article 42 stipulates that when a registered trademark is transferred, the transferor and the transferee shall sign a transfer agreement and submit applications to the Trademark Office at the same time. The transferee shall ensure the quality of the goods using the registered trademark. When transferring a registered trademark, the trademark registrant shall transfer all similar trademarks registered on the same goods, or identical or similar trademarks registered on similar goods. For transfers that are likely to cause confusion or have other adverse effects, the Trademark Office will not approve the transfer and will notify the applicant in writing and explain the reasons. After the transfer of a registered trademark is approved, it will be announced. The assignee shall enjoy the exclusive right to use the trademark from the date of announcement. Article 39 of the Trademark Law: The validity period of a registered trademark is ten years, calculated from the date of approval of registration. Article 42 When transferring a registered trademark, the transferor and the transferee shall sign a transfer agreement and submit applications to the Trademark Office at the same time. The transferee shall ensure the quality of the goods using the registered trademark. When transferring a registered trademark, the trademark registrant shall transfer all similar trademarks registered on the same goods, or identical or similar trademarks registered on similar goods. For transfers that are likely to cause confusion or have other adverse effects, the Trademark Office will not approve the transfer and will notify the applicant in writing and explain the reasons. After the transfer of a registered trademark is approved, it will be announced. The assignee shall enjoy the exclusive right to use the trademark from the date of announcement.