Song Yu (Tony Song)
Duan&Duan Law Firm
International Law
Vice President, Senior Partner
47/F,Maxdo Center, 8 Xing Yi Road, Shanghai 200336,China
+86 21 6219 1103
Main Practice Area

International Law


After graduation from Fudan University in 1983, Tony was qualified in 1984 for patent agent and admitted in 1986 for lawyer.


Tony has represented multinational companies in their intellectual property matters, such as business secret, anti-unfair competition, patent and trademark. He holds more than 30 years’ litigation experiences and has dealt with thousands of cases. With his proficiency in dispute settlement area, Tony is capable of dealing with complex disputes both inside and outsideChina. The client of Tony, with his successful experiences in international and domestic business secret protection, anti-unfair competition, patent infringement, trademark protection, copyright license aspects, mainly includes Microsoft, Lucent, Oracles, Whirlpool, Monsanto, ContiGroup,3M, ResMed, Curative, Tetra Pak, ABB, Rohm, Compal, Folli-Follie, Infosys, Jinjiang International Group, Aijian Group and etc.

Recently, as the lawyer specialized in IP Law, Tony obtained four awards:

  • 2017 Intellectual Property Lawyer of the Year China by International Advisory Experts Award?
  • 2017 IP Lawyer of the Year China by Corporate LiveWire?
  • 2017 Intellectual Property Lawyer of the Year in China by Global 100?
  • 2017 China & Best IP Litigator by Acquisition International Magazine.

Currently, Tony is the member of International Trademark Association. The IP team lead by Tony was the standing director of China Intellectual Property Association and the vice president of <Intellectual Property> Council.

Publication: Deputy Committee Director of < Analysis of China Intellectual Property Classic Cases>


Founded in 1993, Duan & Duan was the first law firm established in China with international standards. Its founders were Chinese students, who returned from overseas studies bringing with them their work experience from abroad at a time when China was undergoing reform and opening-up to the world. In the past two decades, Duan & Duan has become one of the most prestigious PRC law firms with a commitment to providing legal services professionally and with integrity.

Duan & Duan is devoted to providing first class legal advice for domestic and foreign matters and clients. In more than two decades, Duan & Duan has built a team of professionals with extensive experience locally and internationally on complex and sophisticated legal matters. Through the decades, Duan& Duan has been entrusted with representing numerous Chinese well-known state-owned enterprises and privately run businesses both for their domestic legal needs and for expanding their operations abroad into international market. Duan & Duan is also the first choice of many Fortune 500 domestic or international businesses.

Duan & Duan has offices in Shanghai, Beijing, Shenzhen, Kunming, Hefei, Dalian, Chengdu, Xiamen, Chongqing, Hong Kong and Seattle, each with a professional legal team having fluency Chinese, English, Japanese and other languages. Duan & Duan offices are equipped with a uniform computer management system and modern communication tools ensuring the delivery of skilled, timely, and professional legal service to our clients around the world.

Duan & Duan is a full service law firm providing services to clients in a variety of areas. The firm has eight practice areas: Corporate, Securities and Finance, International Investment & Trade and Antitrust, Intellectual Property, Litigation, International Arbitration, Engineering & Real Estate, and Maritime & Admiralty. Each department is led by partners with authority and expertise in their professional area. The departments work cooperatively on matters involving multiple practice areas to cover a broad range of issues and services efficiently and timely.

Duan & Duan has evolved into a law firm with first-rate principles. It provides services professionally and of a global standard.  As more borders are crossed, the firm continues to grow its team of professionals and expand its operations domestically and internationally.

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