Yushu ZHANG used to work in enterprises and public security authorities for many years before working as trademark agent, lawyer and patent agent successively for Beijing Unitalen Attorneys at Law, Beijing G&G Law Firm, Guangdong K&D IP Agency, Beijing Besthold Law Firm and Beijing Anbo Law Firm.

With qualifications of both patent agent and trademark agent, he is specialized in IP legal affairs with over ten years of practice. He is also highly experienced in handling criminal defense, contract, corporate legal affairs and administrative disputes, having been agent for hundreds of civil, administrative and criminal cases and is familiar with procedures of different types of cases. He has been agent for over 1,000 cases of patent application and trademark registration, and therefore knows well the entire process of patent and trademark agency, and has in-depth and unique understanding about IP legal system. Meanwhile, years of experience in legal department of public security authorities also acquainted him with the investigation and handling procedures of different security and criminal cases, and every detail about criminal litigations. He is now a Senior Advisor of the firm.

• Successfully represented Shenzhen Ransheng Industrial Company in the case of alleged patent infringement, making use of defending techniques including publicly known technique and announcement of patent invalidation in three related cases and achieved the optimum result
• Successfully represented Shenzhen Chengjia Industrial Company in the first trial, second trial, patent invalidation and patent invalidation administrative proceedings in the alleged patent infringement case.
• Successfully represented China Grand Enterprises and announced the invention patent invalidation of Jiangsu People's Hospital's Preparation Method of Kuhuang Injection
• Successfully represented a certain dealer in Yiwu City, Zhejiang province in the alleged patent infringement case and in the patent invalidation proceedings. The case was closed with a judgement of patent invalidation.
• Successfully represented Hebei Laoting County Administration of Quality and Technology Supervision in the case of alleged illegal administration and won the case.
• Successfully represented Tangshan Heyi Metal Equipment Co., Ltd in the court defense against register trademark opposition and on the review of opposition.
• Successfully represented Wang Guanglai "Weimeisi" in the court defense on register trademark opposition and on the review of opposition.
• Successfully represented Tianyu Langtong Company in the case of Tianyu Mobile being accused of infringing neighboring rights of musical works of Linfair Records and Huayi Bros. Media Group.
• Successfully provided all-round legal service to the patent technological cooperation between Beijing Innopower Superconducting Co., Limited and Tianji Baili Group Limited.