Dr. Hongying Cai’s main research interests focus on the mechanism and application of probiotics used in animal feed. She has been in charge of more than 10 research projects, including the National Natural Science Foundation of China (Youth Program), sub‑tasks of the National Key R&D Program of China, the Fundamental Research Funds of the Institute of Feed Research of CAAS, and enterprise‑institution cooperation projects. One achievement has been successfully transferred into industrial application. Dr. Hongying Cai has published over 30 academic papers, including 16 SCI papers as first author or co‑corresponding author in journals such as Microbiome and Journal of Animal Science and Biotechnology. She is an inventor on 7 authorized invention patents.