Under Tan's leadership, the organization was able to create greater unity between the leadership of each cultural faction, generating an exchange of business information and becoming a center for charity work and social and cultural reform. It would also become the heart of the anti-Japan China Salvation Movement in Southeast Asia and for the fight against fascism.
這個歷史悠久的上流華社組織在他領導下，改造成為團結各幫僑領、進行商業資訊交流，並開展文化、社會改革和慈善活動的中心，更進一步成為領導南洋華僑抗日救國和支援反法西斯戰爭的心臟。