Li Renjiu, Senior Co Partner of Beijing Deheheng Law Firm. High level talents from the China National Intellectual Property Administration, national guiding experts in responding to overseas intellectual property disputes, review experts from the National Committee for the Protection of Traditional Chinese Medicine Varieties, and off campus cooperation instructors for master students of Zhongnan University of Economics and Law. He used to work in the China National Intellectual Property Administration as a public lawyer, director of the reexamination and invalidation review department, and was seconded to the First Intermediate People's Court of Beijing to engage in the trial of patent, trademark, anti unfair competition and other cases. In 2017, he resigned from public office and joined Green Leaf Pharmaceutical Group as a senior patent director, mainly responsible for domestic and foreign patent litigation, dispute resolution and other work, and participated in a number of European and American patent litigation, objection and invalidation cases and achieved success. During his legal practice, Lawyer Li Renjiu represented clients in various cases, including disputes over inventor attribution rights, patent invalidity, infringement and administrative litigation, disputes over generic drug registration patents, technology licensing, and intellectual property investigations related to investment and mergers and acquisitions.