Meet the team

Chang Tsi & Partners

Chang Tsi & Partners

Beijing, China
(+86) 10 8836 9999
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Deals

  1. Invalidation Case Against Plagiarizing OREO’s Trademarks [2023 Top 10 IP Cases by Wuxi Municipal Court and 2023 Top 10 IP Cases by Beijing Xicheng District Lawyers Association]
  2. Dispute Over Information Online Dissemination Rights [“2023 Deal of the year” by China Business Law Journal]
  3. Invalidation Case of the Design Patent Named “Automobile” [2022 Top 10 Patent Reexamination and Invalidation Cases by the China National Intellectual Property Administration]
  4. Chen’s Retrial Case of Selling Counterfeit Trademarked Goods [2022 Top 10 IP Cases by Chongqing Municipal Court]
  5. Baidu v.s. Fujian Yongan Endian Co., Ltd. [“2022 Top 10 IP Cases” by Fujian Provincial People’s Court]
  6. MICHAEL KORS v.s. Shantou Chenghai Jianfa Handbag Craft Factory [“Deal of the year”&“The Top Ten Intellectual Property Case with Research Value”&“Representative Case of the Year” recommended by the Supreme Court, Zhejiang High Court and Hangzhou Intermediate Court]
  7. Ambitmicro Technology Limited. v. Ambiq Micro,Inc. and Fujitsu Semiconductor (Shanghai) Co., Ltd. [“2019 Top 10 IP Cases” by Shanghai People’s Court]
  8. Dongfang Xianglin v.s. Shenzhen Pagoda Orchard [2019 Top 10 Representative IP Cases]
  9. Chen’s sales of sanitary products with a “TOTO” counterfeit trademark [2019 Top 10 Representative IP Cases]
  10. BOE Technology Group Co,Ltd. & Beijing Orient Vacuum Electric Co, Ltd. Suing Wenzhou BOE Vacuum Electric Co, Ltd. Unfair Competition [“2019 Top 10 IP Administrative Protection Cases” by Ningbo People’s Court]
  11. Trademark Protection Project Regarding Request for Declaration of Trademark Invalidation for “Weixin (Wechat) ” [2019 Top 10 Trademark Application Cases]
  12. Trademark Protection Project Regarding Request for Declaration of Trademark Invalidation for “Yi Kou Lian” [2019 Top 10 Trademark Application Cases]
  13. Administrative Lawsuit between IDEAL LIFE INC. and CNIPA on the Request for Declaration of Trademark Invalidation for “完美生活IDEAL LIFE”[2019 Top 10 Trademark Application Cases]
  14. Guinness World Records v. Chery Automobile: Trademark Infringement and Unfair Competition [“2017 Deal of the Year” by Chinese Business Law Journal & “2018 Top 10 IP Protection Cases” by Ningbo People’s Court]
  15. Under Armour v. Fujian Tingfeilong [2018 Outstanding Trademark Cases, reported by New York Times, Wall Street Journal, Law360, etc.]

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Team Services

Chang Tsi & Partners is a “National Outstanding Law Firm” (nominated by the Ministry of Justice of China) with a strong reputation in intellectual property and litigation.

Since its establishment in 2002, Chang Tsi & Partners has become one of the leading law firms in China. The firm has consistently been referred to as “The Best IP Law Firm in China,” “China IP Law Firm,” and “Tier 1 IP Law Firm of the Year” by various international legal directories and business magazines such as Chambers & Partners, The Legal 500 Asia Pacific, and Asialaw Profiles. In 2024, Chang Tsi & Partners was listed as a highest-level AAAAA Patent Agency by the Beijing Patent Attorneys Association.

With over 350 professionals, including attorneys at law, patent attorneys, and trademark attorneys, Chang Tsi & Partners is based in Beijing, with fully-fledged offices in Shanghai and Shenzhen, and branch offices in Guangzhou, Guangxi, Chengdu, Hong Kong, Macau, Taiwan, the United States, and Korea. The firm has established an enviable reputation in intellectual property and litigation.

Our areas of practice include intellectual property rights, litigation and dispute resolutions, commercial law and other legal services. Since establishment, we have been a forerunner in various fields such as trademark, patent, IP confirmation, administrative IP as well as judicial protection. Our high-caliber Lawyers and our sharpest IP experts are dedicated to protecting your legal rights with efficiency and integrity.

At Chang Tsi & Partners, you can find the knowledge, experience, and professionals to handle all aspects of law in both domestic and international matters. The firm is the trusted partner of many Chinese and international enterprises in developing strategic decisions and securing their interests both in China and overseas.

Testimonials

Campbell Soup Company

“Chang Tsi & Partners is comprised of highly effective IP professionals. The team members have consistently demonstrated superior judgment, exceptional analytical skills and high integrity. Without exception, they have demonstrated unparalleled understanding of China trademark law and regulations. They are extremely prompt and thorough in their responses to our inquiries and requests. Their collective and deep understanding of China practice provides the competence for issues which are deeply valued. For example, their advice on subtle prosecution issues have turned out to be key considerations in our transactional analysis and guidance for our in-house clients.”

Twitter Inc

“Spring and her colleagues at Chang Tsi & Partners have become our invaluable advisors. The complex nature of business in China requires not only sound legal advice but also a pragmatic business approach. Spring and Nana routinely provide great practical insight and astute legal guidance in a holistic manner. Notably, they adopt a creative approach in handling significant and complex matters. Moreover, they are diligent in their approach and very responsive to our inquiries. They proactively communicate about matters, help manage the docket judiciously and try to resolve issues expeditiously. Finally, they are receptive to our guidance and collaborative in their approach.”

Awards and Recognition

Chambers Greater China 2024

Chang Tsi & Partners has been listed in both Intellectual Property: Litigation and Intellectual Property: Non-Litigation as a leading Chinese law firm.

IP STARS 2024

Chang Tsi & Partners is proudly recognized as an IP STAR 2024 for both Trademark Prosecution and Trademark Contentious matters by Managing Intellectual Property (MIP). Managing Partner Spring Chang and Partner Michael Wu have been recognized as IP Stars for Trademark and Patent, respectively.

Gold Trademark Law Firm by WTR 1000

Chang Tsi & Partners has been recognized as a Gold Tier Trademark Firm by World Trademark Review (WTR) in consecutive years. Simon Tsi, Spring Chang, and five other professionals from the elite team have also been recognized as leading individuals.

China Business Law Awards 2024

Chang Tsi & Partners has consecutively won the China Business Law Awards. Based on unremitting efforts to cover China’s legal market, China Business Law Journal selected the winners in each category after months of research and evaluation. This process involved gathering direct feedback from the market, examining thousands of votes and recommendations from domestic and international corporate counsel, decision-makers in management, legal academics, and government officials, and taking into account significant transactions, cases, or other notable achievements in which each firm has been involved in over the past year.

Employer of Choice: China Top 20 Law Firms

Chang Tsi & Partners has been recognized as one of the “Employer of Choice: China Top 20 Law Firms” by LEGALBAND.

AAAAA Patent Agency

Chang Tsi & Partners was listed as a highest-level AAAAA Patent Agency by the Beijing Patent Attorneys Association.