Jieyun Cai

Jieyun is a partner of Yuanda and member of Yuanda’s Intellectual Property practice group. He has extensive experience in handling IP disputes, covering IP strategy layout, compliance system construction, and dispute resolution litigation in various areas including patent infringement, patent invalidation, trademark, trade secret, internet and copyright, and unfair competition. He has represented various multinational companies and domestic enterprises in handling complex IP litigation and disputes over the years. He has also led teams in optimizing client’s IP portfolios and strategic operations.


Dispute Resolution

  • Represented a global computer product manufacturer in successful defense against an experienced non-practicing entity (NPE), including completely invalidating the NPE’s patents.
  • Represented a German auto parts manufacturer in a series of successful patent infringement lawsuits in China.
  • Represented a UK-based automotive manufacturer in multiple successful patent infringement litigations in China.
  • Represented a major coal company and won in a lawsuit brought by its competitor before the Shanghai Intellectual Property Court, the Shanghai High Court, and the PRC Supreme People’s Court.
  • Represented a Finnish company bringing several patent lawsuits throughout China and won favorable results.
  • Represented a leading Chinese internet company in sizable lawsuits filed by a copyright holder, and forced the withdrawal of the lawsuits.
  • Represented a Japanese apparel company in successful trademark infringement litigation in China.
  • Represented a local fitness brand in defending a trademark infringement strike from its U.S. competitor, and won a favorable result.
  • Represented an Israeli semiconductor manufacturing equipment provider in multiple patent protections in China and won huge competitive advantages in the market for our client.
  • Represented a network game company in the protection of its animated images, forcing its competitors to give up the market.
  • Represented a U.S. communications technology patent holder against a large number of invalidation claims in China and maintained core patents for the client.
  • Represented one of the world’s top chip manufacturers in a patent infringement lawsuit initiated by a NPE in China and won the case.
  • Represented a Chinese consumer electronics manufacturer in in defending a patent infringement litigation in the U.S. .
  • Represented a leading Chinese special fiber optic cable manufacturer in a criminal reporting of trade secret infringement, appeared in court as agent ad litem, and won a favorable result.
  • Represented one of the top semiconductor companies in China in initiating a criminal reporting against an employee for providing trade secret to an overseas organization, and ultimately helped the client achieve a satisfactory outcome, making the case the first criminal case where the offence constitutes this crime in China.

Non-Dispute Resolution

  • Represented a Chinese online game company in negotiations with a top U.S. software developer and successfully obtained an exclusive license for the developer’s software in mainland China, and subsequently initiated a copyright infringement lawsuit.
  • Conducted patent and trade secret due diligence for a multinational group for its acquisition of a Chinese steel company.
  • Represented a leading Chinese optical fiber company in its negotiations with a European industry leader, provided advice regarding patent infringement and antitrust issues, and helped the client cross the barriers and enter the EU market.
  • Advised a medical instrument company on IP challenges such as infringement litigation, invalidation claims and negative publicity during its listing review.
  • Advised a Chinese home appliances company on establishing a competitive patent protection plan.
  • Built IP compliance system for a top Chinese gaming studio.
  • Advised on the establishment of a high-technology joint venture between the U.S. and China.
  • Represented a top French automobile company in IP due diligence in its acquisition of a Chinese new energy technology company.
  • Built a trade secret compliance protection system for a leading industrial automation control group in China.


  • Outstanding Party Member Lawyer in Shanghai Lawyer Industry, 2018
  • “Young Talent” of Jing’an District, Shanghai, 2017