Dr. Huazhe Si is associate professor in the college of animal science and technology at Jilin agricultural university (JLAU), China. He earned a BS (2013), MS (2016), and PhD (2021) in animal nutrition and feed science at JLAU. He served as assistant researcher at the institute of special animal and plant sciences, CAAS (2016–2020), then lecturer at JLAU (2020–2023); associate professor since 2024. His research focuses on nutritional regulation of gut microbiota, especially amino acid requirements and microbe–metabolite–host interactions during sika deer antler growth. More: dk.jlau.edu.cn/tshow.asp?id=1777.