Chang Tsi & Partners has been widely recognized as an outstanding law firm. The firm has also been celebrated as a top-tier IP law firm by many world-leading legal media outlets, ranking agencies and professional associations, including Chambers Asia Pacific, World Trademark Review, Legal 500 and Asia Legal Business.
Chang Tsi & Partners is an outstanding law firm with its strong reputation in intellectual property and litigation.
With a rich history in corporate law, and the sharpest IP team in China, we have knowledge, experience and professional networks to safeguard your legal rights. There is a reason why a growing number of US Fortune 500 companies choose Chang Tsi & Partners than any other firms in China.
Chang Tsi's Intellectual Property practice and 3 lawyers have earned high rankings from Chambers & Partners in the 2025 edition of Chambers Greater China Region. The firm has been ranked in IP litigation (PRC Firms) and non-litigation (PRC Firms) in the new edition, managing partner Spring Chang was again named eminent practitioners, partners Michael Fu and Michael Wu were also in the guide's top tier.
The world-renowned legal rating agency, The Legal 500, has recently published its 2025 list of leading law firms in the Asia-Pacific region. This list has garnered significant attention within the legal industry and plays a crucial role in evaluating law firms across the region.
In the fiercely competitive legal market, Chang Tsi & Partners has earned the prestigious 2024 China Business Law Award for Intellectual Property (Trademarks) through exceptional professional services and high client recognition. This honor not only reflects the trust our clients have in our abilities but also underscores our commitment to excellence in intellectual property law.
O2 PARTNERS, LLC, a renowned American company, is one of the many well-known enterprises that receive comprehensive intellectual property services from attorney Tracy Shen and her team at ChangTsi. In 2024, Tracy and her team represented O2 PARTNERS, LLCin a trademark infringement lawsuit against an operator on the Pinduoduo platform. Recently, the Xuhui District People's Court in Shanghai issued a first-instance judgment (which has become effective as the defendant did not appeal), fully supporting the plaintiff's claims. The court recognized the high reputation of O2 PARTNERS, LLC's "ORTHOLITE" trademark in the footwear and shoe materials industry, confirmed the defendant's use of multiple trademarks as infringement, and awarded one-time punitive damages, compensating the client nearly CNY 2.6 million for economic losses. Additionally, the court ordered a statement to be published in the "China Intellectual Property News" to mitigate the negative impact on the client's trademark and reputation.
In the wave of globalization, it is crucial for companies venturing abroad to establish a robust intellectual property layout, especially patent layout. This not only helps maintain the core competitiveness of the enterprise, reduces operational and legal risks, but also gains market advantages and combats potential infringement by competitors. So, what are the routes for overseas patent applications? Below, we will introduce three main routes for overseas patent layout.
Chang Tsi & Partners has been listed as a Gold firm by the World Trademark Review in its WTR1000 2025 edition for China domestic prosecution and strategy, and a Silver firm for China domestic enforcement and litigation.
6-8th Floor Tower A, Hundred Island Park, Bei Zhan Bei Jie Street, Xicheng District, Beijing 100044, P.R. China
(+86) 10 8836 9999
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38E China Energy Storage Building, No.3099, Keyuan South Road, Nanshan District, Shenzhen 518057, P.R. China
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(+86)771 3169996
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Room 2025, Jiaozi&BEEPLUS Center, Xingsheng International Business Headquarters, No. 81 Information Park West Road, Jinniu District, Chengdu City
(+86) 28 6844 6256
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(+852) 3959 8555
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Level 20, AIA Tower Nos.251A-301, Avenida Comercio De Macau
(+853) 6890 0935
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6F., No. 2, Sec. 3, Bade Rd., Songshan Dist., Taipei City 105608
(+852) 6938 8223
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(+82) 10 96649304
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100 Overlook Center, 2nd Floor, Princeton, NJ 08540
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