Mr. Yongxin Yu is an academician of the Chinese Academy of Engineering and is currently the Chief Vaccine Expert of the National Institutes for Food and Drug Control. As a prominent leader in the field of vaccinology and virology in China. Mr. Yu has nearly 60 years of experience in the research and development of vaccines and has been widely recognized for his contributions to the quality control and research of vaccines for diseases such as Japanese encephalitis and rabies. From the 1950s to the 1980s, he led the development of the SA14-14-2 strain for the Japanese encephalitis live attenuated vaccine, which was the first live attenuated vaccine against Japanese encephalitis in the world and has fundamentally suppressed the viral spread in China since its mass adoption. He also chaired the strain selection and cultivation relating to primary hamster kidney cell rabies vaccine in China, which improved the safety and efficacy profile compared with previous rabies vaccine then available in China. Mr. Yu has authored or co-authored numerous articles and books and currently serves on the editorial boards of several peer-reviewed journals.