Chuancheng Chai is an intellectual property attorney and head of the IP department at Chongqing Tong'an Law Firm in the Jiangbei District of Chongqing. He holds a master's degree from Fudan University and has developed specialized expertise in patent law, trademark registration, copyright protection, anti-unfair competition, and intellectual property litigation.

Attorney Chai advises both domestic and international clients on patent portfolio management, patent infringement analysis, freedom-to-operate opinions, and IP licensing negotiations. He handles patent invalidation proceedings before the China National Intellectual Property Administration (CNIPA) and represents clients in patent infringement litigation before Chinese courts. China uses a first-to-file patent system, meaning the first party to file a patent application has priority regardless of who invented first. Patent protection in China lasts 20 years from the filing date for invention patents, 10 years for utility model patents, and 15 years for design patents.

His trademark practice covers trademark registration strategy, opposition and cancellation proceedings, trademark infringement litigation, and brand protection in the Chinese market. Trademark registration in China follows a first-to-file system as well, making early registration critical for brand owners entering the Chinese market. China is a member of the Madrid Protocol, allowing international trademark registration through a single application. Attorney Chai helps clients navigate the trademark registration process, from preliminary search and classification selection through examination, publication, and opposition periods.

Attorney Chai also handles copyright registration and enforcement matters. While copyright in China arises automatically upon creation of a work, voluntary registration with the Copyright Protection Center provides important evidence of ownership in infringement disputes. He advises clients on copyright licensing, assignment, and enforcement strategies. His anti-unfair competition practice covers trade secret protection, business reputation infringement, and misleading advertising cases under the PRC Anti-Unfair Competition Law.

Attorney Chai serves clients throughout Chongqing and nationally, providing strategic IP counsel to technology companies, manufacturers, and creative enterprises.