Established in 2015, Beijing YiJu Law Firm is a high-level, specialized Chinese law firm organized in corporate system, with its headquarters in Zhongguancun, Beijing. YiJu adheres to the core values of "rigorousness, practicability, integrity and concentration", and is committed to providing specialized legal services and risk control solutions for corporate clients.

YiJu has more than 30 patent litigators and full-time intellectual property lawyers, and have represented more than 2,000 litigation cases relating to patent invalidation, infringement litigation, administrative litigation infringement and trademark litigation, etc., including many cases with social impact, e.g., CSPC levamlodipine patent dispute, Gree vs. Aux patent invalidation case, Mobike patent invalidation case, Hong Kong-Zhuhai-Macao Bridge patent invalidation case, Tencent "Wesee" trademark administrative litigation, Zhongshan Yunteng trademark infringement litigation, Liebherr trademark administrative litigation, Zhoukou "Changshoushan" trademark administrative litigation, patent inventor qualification dispute related to Beijing Olympic "Giant Footprint" launcher, Lertech patent ownership dispute, SJ Environmental Protection unfair competition litigation, U.S. CBI trade secret litigation, etc.

Among these, the Mobike patent dispute case was selected as one of the "Top Ten Typical Cases of Patent Administrative Protection in Beijing in 2017" and "Top Ten Cases of Patent Invalidation & Reexamination in 2017 issued by Patent Reexamination Board", Jinyuan Maofeng patent dispute case was selected as one of the "Top Ten Typical Cases of Patent Administrative Protection in Beijing in 2017" and "Top Ten Typical Cases of Patent Infringement and Counterfeiting in 2017 issued by CNIPA", Lertech patent dispute was selected as one of the "Typical Cases of Intellectual Property Court of Supreme People's Court", and Aipeiyi vs. Huawei patent invalidation case of "Liquid anti-shake lens" and the patent invalidation case of "Clathrate compound for butylphthalide cyclodextrin or cyclodextrin derivatives and its preparation method and application" were jointly selected as the "Top Ten Cases of Patent Invalidation & Reexamination in 2020 issued by CNIPA".