Proof of trademark transfer: 1. Trademark agency power of attorney signed or stamped by the transferee. 2. Trademark transfer application signed or stamped by the trademark transferor and transferee. 3. A copy of the trademark transferee’s business license/ID card and individual industrial and commercial household registration certificate. 4. A copy of the trademark transferor’s business license/ID card. 5. A copy of the trademark transfer agreement signed or stamped by the transferor and the transferee. Article 42 of the Trademark Law states that 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.