It is a professional law firm with legal litigation agency and legal control in the knowledge industry cluster of Fox Group, business registration number: 53235713-001-11-15-2; business scope: legal consultation, legal Service, Legal Planning, Legal Control, Legal Training; Director of the Firm, Du Yongjin, former teacher of the Public Security Cadre School, an in-service Juris Doctor at China University of Political Science and Law, an in-service Juris Doctor at Beijing Normal University, and a US Certified Forensic Accountant. Membership number: CN01051，British Chartered Arbitrator, menbership  card number :6116514,Assistant lawer in New York State, United States, membership card number: 74770714. He has been working with the chief lawyer Shen Teng (Doctor of Law) of Beijing Shuaihe Law Firm, the chief lawyer Cao Shengming (Doctor of Law) of Beijing Cao Shengming Law Firm, the chief lawyer Yang Zhiyong of Beijing Yang Zhiyong Law Firm, and the lawyer Sun Shizhen of Beijing Longan Law Firm. (Doctor of Law), Lawyer Lang Zijun, Chief Lawyer of Beijing Jiafa Law Firm, Lawyer Li Xiaolin of Beijing Weiheng Law Firm, Lawyer Lei Danmei, Lawyer Xia Jiansan, Director of Beijing Sanfan Law Firm (Doctor of Law, Postdoctoral Fellow of University of Cambridge, UK), Zhejiang Wang Zheng, chief lawyer of Taihang Law Firm, and Fang Dongsheng, chief lawyer of Zhejiang Chuangxin Law Firm. There is a relationship between doctoral students and master students, and good business cooperation and personal connections.