On December 14, 2025, Guo Wenhai, Secretary of the Zhongshan Municipal Party Committee, and Mayor Yin Nianhong met with a delegation led by Dr. Jonathan Choi, Standing Committee Member of the National Committee of the Chinese People's Political Consultative Conference, Chairman of the Greater Bay Area Entrepreneurs Alliance, President of the Chinese General Chamber of Commerce (Hong Kong), Chairman of the Beijing-Tianjin-Hebei Bohai Rim Entrepreneurs Alliance, and Chairman of the Sunwah Group. The two sides held in-depth discussions on further enhancing cooperation.