In order to deepen the integration of legal theory and practice and support the development of foreign-related legal talents, the Vis Pre-moot of the 33rd Willem C. Vis International Commercial Arbitration Moot Competition was successfully held in Guangzhou from March 5 to 6, 2026. This competition attracted many top universities in South China, including the School of International Law at Peking University, Sun Yat-sen University, Jinan University, South China University of Technology, Guangdong University of Foreign Studies, South China Normal University, and Shenzhen University. Lawyers Yang Lun, Cai Mengfei, and Ou Yingshi from Longan (Guangzhou) Law Firm were invited to serve as arbitrators in this debate competition. They used their professional expertise to ensure fairness and justice in the competition and provided valuable guidance to the participants.
During the evaluation process, the lawyers demonstrated their professional skills and fulfilled their duties from a rigorous arbitrator’s perspective. Lawyer Yang Lun always maintained a professional and fair attitude. After each debate, he gave precise comments on the participants’ performance and logical structure, focusing on the key issues and offering professional suggestions.
Lawyer Yang Lun expressed his opinions as an arbitrator.
Lawyer Yang Lun took a photo with the participants as the chief arbitrator of this competition.
Lawyer Cai Mengfei listened carefully to each participant’s statements. With her solid professional knowledge, rich expertise, and extensive practical experience, she objectively analyzed the participants’ strengths and weaknesses, gave precise comments, and provided useful suggestions based on their performance.
Lawyer Cai Mengfei listened carefully to the participants’ statements.
Lawyer Cai Mengfei took a photo with the participants.
Lawyer Ou Yingshi evaluated the participants’ performance during the competition. She analyzed their performance in detail, covering logical reasoning, evidence, and communication skills. Her suggestions were both professional and practical, demonstrating the professional standards and meticulous attitude of a commercial arbitrator.
Lawyer Ou Yingshi gave comments as an arbitrator in the debate competition.
Lawyer Ou Yingshi took a photo with the participants.
After two days of intense competition, the International Commercial Arbitration Moot Competition came to a successful conclusion. In this competition, we not only saw the excellent performance of the participants but also saw the professional comments and guidance provided by the three lawyers from Longan (Guangzhou) Law Firm as arbitrators.
As young lawyers specializing in foreign-related law, Lawyers Yang Lun, Cai Mengfei, and Ou Yingshi demonstrated their outstanding legal expertise. They had a deep understanding of international commercial arbitration rules and the ability to analyze legal issues professionally. They also had a rich knowledge base and could provide professional guidance to the participants. Their excellent English skills were in line with the needs of international commercial arbitration, reflecting the professionalism and meticulousness of foreign-related legal talents. With their fair evaluation and professional comments, they demonstrated the professional standards and commitment of legal professionals in the new era.
Longan (Guangzhou) Law Firm always attaches great importance to the development of international commercial arbitration. It actively supports the organization of foreign-related legal competitions and provides a professional platform for young legal talents. The fact that several outstanding young lawyers were invited to serve as arbitrators in this competition shows the firm’s emphasis on the development of foreign-related legal talents and international commercial arbitration. In the future, Longan (Guangzhou) Law Firm will provide more professional services and a more open perspective to contribute to the development of foreign-related legal talents and the high-quality development of international commercial arbitration.
About the Competition
The Willem C. Vis International Commercial Arbitration Moot Competition is the only moot competition organized by United Nations agencies worldwide. It is one of the largest and oldest moot competitions in the world. Since 1994, it has been held every spring in Vienna, Austria, with approximately 300 teams from universities around the world participating each year. Since 2003, the Vis East Moot has been held in Hong Kong, making it the highest-level competition for the Vis Moot in the Eastern Hemisphere. In addition to the Vis Moot and Vis East Moot, the Vis Moot Organizing Committee holds pre-competition competitions around the world to enhance the experience of participating teams and improve the overall quality of the competition. This competition is one of the three pre-competition competitions for the 33rd Willem C. Vis International Commercial Arbitration Moot Competition in mainland China. It has a great impact in the field of commercial arbitration and academia.
About the Lawyers
Lawyer Yang Lun
Lawyer Yang Lun is a lawyer at Longan (Guangzhou) Law Firm in Beijing. He graduated from the School of Law at Sun Yat-sen University and the School of Law at Vanderbilt University in the United States. Since starting his practice, Lawyer Yang Lun has focused on foreign-related legal services. He has handled many cases related to intellectual property, corporate matters, and dispute resolution. He is also included in the list of new foreign-related lawyers in Guangdong Province. Lawyer Yang Lun is a member of the Guangzhou International Commercial Law Service Center and the deputy secretary-general of the Haizhu branch of the Guangzhou European and American Students Association. He has a significant influence in foreign-related legal services and international relations.
Lawyer Cai Mengfei
Lawyer Cai Mengfei holds a master’s degree in procedural law from Renmin University of China. She is a new foreign-related lawyer in Guangdong Province. She is a lawyer at Longan (Guangzhou) Law Firm in Beijing and works mainly at the Guangzhou office.
Lawyer Cai Mengfei has many years of experience in dispute resolution, intellectual property, international trade, and debt collection. She has extensive experience in international trade and intellectual property protection. She is skilled in applying theoretical knowledge to practical situations and solving complex legal problems efficiently.
Lawyer Cai has provided legal services to many large companies, foreign companies in China, and Sino-foreign joint ventures. Her services cover various fields such as new consumption, new media, and construction engineering. She has successfully handled domain name disputes, construction project settlements, and trademark protection cases. She has also helped clients with equity investment frameworks, providing comprehensive legal services. Her work has been widely recognized.
Lawyer Cai Mengfei holds a master’s degree in procedural law from Renmin University of China. She uses Chinese and English as her working languages. Before joining Longan Law Firm, she worked in several leading law firms in China.
Lawyer Ou Yingshi
Lawyer Ou Yingshi is a partner at Longan (Guangzhou) Law Firm and the director of the Sanctions and Double Anti-Subversion Committee. She has a strong legal background in foreign-related matters. Lawyer Ou has provided legal services to many large companies, especially automotive companies, including foreign investment, export control and sanctions, anti-dumping, countervailing measures, international arbitration, foreign-related litigation, and long-term foreign-related legal services. Her clients have given her high praise.
She has participated in the management of several well-known manufacturing companies’ overseas investment projects. These projects involve countries such as Thailand, Mexico, Russia, and Singapore. Lawyer Ou has also served as a legal advisor for a well-known automotive company in Thailand, Vietnam, Myanmar, and Cambodia. She is skilled in foreign-related litigation and international arbitration. She has represented clients in many foreign-related litigation and international arbitration cases, protecting their rights and achieving satisfactory results. So far, Lawyer Ou has established close relationships with many well-known law firms and overseas institutions in 30+ countries and regions, including Hong Kong, Macao, Southeast Asia, Middle East, Central Asia, Europe, South Asia, Australia, Africa, and Latin America. Her clients are from various industries, including intelligent networking, new energy, AI, drones, traditional manufacturing, and healthcare.