Dr. Liu is an associate professor in the Department of Epidemiology and Biostatistics at the School of Public Health, Peking University. As a principal investigator, she has leaded ten projects, which were funded by the National Natural Science Foundation, the Ministry of Science and Technology of China, the National Health Commission of China, etc. And she has also engaged in more than nine national projects, including the National Major Scientific and Technological Special Project of China, the National Science & Technology Pillar Program, etc. She has published more than 70 papers in the recent 5 years, including Lancet Global Health, Lancet Infectious Disease, Bull World Health Organ, etc.. She is now the member of the Expert panel of COVID-19 in the National Health Commission of China, the member of big data working committee of on rehabilitation in the rehabilitation medical association of China, vice president of the Youth Committee of the Soft Tissue Oncology Branch of China Association for the Promotion of International Exchange in Healthcare, and the member of the Epidemiology Professional Committee of Beijing Preventive Medicine Association, etc.. She has awarded the first prize of the Science and Technology Award of the Chinese Preventive Medicine Association, the first prize of National Maternal and Child Health Science and Technology Award, and the Beijing May Fourth Youth Medal, Peking University Academic Innovation Award, etc..