On May 26, the 4th Guangzhou International Conference on Respiratory Diseases was concluded at Guangzhou Building. The conference lasted three days and received nearly a hundred contributions. Nearly a thousand participants from dozens of countries and regions such as China, the US, the UK and France gathered to have an in-depth discussion and exchange on respiratory system diseases, particularly chronic obstructive pulmonary diseases, sleep-related breathing disorder and related respiratory mechanics mechanism. The conference has brought frontier respiratory medical knowledge to the participants and played an active role in strengthening international exchanges, grasping the research directions of respiratory medicine in the future and enhancing the respiratory medical clinic and scientific research level of China.