Professor Liu’s research has centred on microbial pharmaceutical engineering, functional food science, and advanced food manufacturing, with particular emphasis on microbial drugs, functional food ingredients, and innovative food-processing technologies. Through sustained participation in national major research programmes and international scientific collaboration, he has contributed to the development of microbial pharmaceutical engineering and functional food technologies in China. His research has addressed the development and application of microbial resources, functional food components, and advanced processing approaches, with relevance to food safety, health, and sustainable food production. Author of numerous peer-reviewed publications, Professor Liu has also contributed to the training of researchers and to the development of professional networks in food science and biotechnology. His work connects fundamental research in microbiology and biotechnology with practical applications in functional foods, food safety, health-related products, and modern food manufacturing.