Legal analysis: 1. The transfer act takes effect after the trademark assignor and the trademark assignee sign the transfer agreement, but the transfer formalities have not been completed. According to the provisions of China's Trademark Law, the transferee can only enjoy the exclusive right to use a trademark after the application for trademark transfer is approved and announced by the Trademark Office.

2. After the trademark transfer is completed, the transferee shall enjoy the exclusive right to use the trademark from the date of announcement. If the original trademark registrant continues to use the trademark for goods without permission, it is illegal.

Legal basis: Article 13 of the Trademark Law of People's Republic of China (PRC) is a trademark well known to the relevant public. If the obligee thinks that his rights have been infringed, he may request the protection of well-known trademarks in accordance with the provisions of this law. A trademark applied for registration on the same or similar goods is a well-known trademark copied, imitated or translated by others, which is not registered in China. It is easy to cause confusion, so it is not registered and prohibited to be used. Where a trademark applied for registration on different or dissimilar goods is a well-known trademark registered by others in China, misleading the public and possibly harming the interests of the registrant of the well-known trademark, it shall not be registered and its use shall be prohibited.