Kai Chen is an assistant researcher at the Freshwater Fisheries Research Center of the Chinese Academy of Fishery Sciences, specializing in the detection and risk assessment of fish pathogens, and the development of disease prevention technologies. His project experience includes health and environmental monitoring of farmed crucian carp (2016-2018), investigating the pathogen behind crucian carp red gill disease (2017-2018), and conducting risk assessments for food-borne parasites in rainbow trout (2019) and grass carp (2020-2021). He has also contributed to the development of Chinese herbal medications and explored green approaches for disease control. From 2017 to 2019, he led a project focused on quality evaluation and safety risk assessment of microecological agents in East China, advancing the standardization of this preventive technology.