Since its inception in 2002, Chang Tsi & Partners has successfully positioned itself as one of the top law firms in China. It has a strong reputation for IP protection and disputes in China. The firm has kept boosting its international presence in the U.S., Europe, Japan and other Asian markets in recent years.
Notable soft IP practitioners: Spring Chang, Simon Tsi, Michael Fu, and Nancy Qu.
2026
"They are very responsive. They also provide clear communication and good advice about Chinese law."
"Able to navigate the complex Chinese IP system and explain this in clear terms."
"They are responsive, reliable and comply with the specific and sometimes complex processes and requirements we impose."
2025
"Reliability, responsiveness, and high-quality work."
"The team are very strategic and commercial in their advice, and offer value for money for our clients doing business in China."
“The team is professional, detail-oriented, and proactive in offering practical solutions. It’s clear they are committed to achieving the best outcomes for their clients."
“Their deep local expertise combined with clear, responsive communication made them a reliable choice for our needs."
"They answer immediately, and are very organised.”
"They are proactive, strategic and provide value for money."
"Very professional, prompt responses."
"We chose Chang Tsi & Partners because of their strong reputation in the IP field, particularly in China, and their proven track record of delivering high-quality results for international clients.”
"We have excellent experiences with them."
"What we appreciate most about Chang Tsi & Partners is their deep expertise in Chinese IP law, their strategic approach to complex issues, and their responsiveness.”
Case studies show the firm helped Sennics Technology manage its global patent lifecycle and strategic portfolio development, successfully establishing a high-value patent portfolio that underpins the client’s commercial expansion and technology licensing worldwide. Clients include OnePlus Technology and Yokogawa Electric Corporation.
Case studies show the firm represented O2 Partners in a trademark infringement lawsuit against a Pinduoduo operator and successfully persuaded the Shanghai Xuhui District Court to confirm the infringement of the "ORTHOLITE" mark. Clients include Illinois Tool Works and Tyco Fire & Security.