1 The infectious diseases associated with behavior and ecological changes 2 Progress in Epidemiology of Emerging Tick-borne Infections in China 3 Progress on Epidemiology of Influenza A(H1N1) 4 Progress in Novel Vaccine Clinical Epidemiology Research in China 5 Progress in Epidemiology of Ebola Virus Disease 6 Progress in dengue epidemiology 7 Research Progress of the Epidemiology of COVID-19 8 Epidemiological progress of severe fever with thrombocytopenia syndrome 9 Progress in Epidemiology of Tuberculosis in China 10 Recent Advances in Genetic Epidemiology of Colorectal Cancer in Chinese Population 11 Research Progress in Infectious Agents of Malignant Tumors 12 Progress of Lung Cancer Genomic Epidemiology in China 13 Progress in Epidemiology of Child Road Traffic Injury 14 Research progress of fracture epidemiology 15 Extreme Weather and Mortality and Cardiovascular Diseases 16 Twin research in China and worldwide 17 Development of Active Surveillance System for Drug Safety in China 18 Research advances in epidemiology of autoimmune diseases in China 19 Advance in Large-scale Prospective Cohort Studies of Chinese Adults 20 Some Random Reflections on Evidence-based Medicine, Precision Medicine and Big Data Research 21 Research Progress in Biomedical Big Data 22 Cultural Epidemiology in China 23 Progress and Perspective of Transmission Dynamics Models in Prevention and Control of COVID-19 Pandemic 24 Propensity Score and Mendelian Randomization for Control of Confounding 25 Progress of Air Pollution Epidemiology Research in China.