The Didi trademark case refers to Didi, a company that originally specialized in providing online ride-hailing services. At the end of 2015, in order to expand its business, it decided to rename its "Didi Taxi-hailing" APP to "Didi Chuxing" and Registered the "Didi Chuxing" trademark. However, before that, a taxi-hailing software called "Didi" had already been launched in the domestic mobile application market and had the "Didi" trademark.

In 2016, the company called "Didi Technology Co., Ltd." filed an objection to the Trademark Review and Adjudication Board, believing that Didi's "Didi Chuxing" trademark constituted infringement and had already registered its "Didi Chuxing" trademark. "Trademarks pose a threat. Subsequently, the Trademark Review and Adjudication Board determined that Didi Company’s “Didi Chuxing” trademark had infringed upon the trademark rights of “Didi Technology” Company.

Didi Company subsequently filed a lawsuit with the Beijing Intellectual Property Court, requesting to revoke the decision of the Trademark Review and Adjudication Board, and believed that the "Didi Chuxing" trademark did not constitute infringement of the "Didi Technology" trademark. In the end, the Beijing Intellectual Property Court supported the decision of the Trademark Review and Adjudication Board in its judgment and determined that the use of the Didi Chuxing trademark would have an adverse impact on the Didi Technology trademark.

In this case, the main issues involved include trademark infringement, conflicts between trademark rights, and the independence of the Trademark Review and Adjudication Board. This case also highlights that the relationship between trademark registration and trademark infringement has become increasingly complex and severe in the Internet field. This also reminds companies to be more cautious and prudent when expanding their business and registering trademarks.