Working in China. Yu Sijun, a native of Shangrao, Jiangxi, was a lecturer in the national youth public examination. In 2023, he served as the chief teacher of South China University of Technology Education, lecturer of national youth public examination, and doctor of law. He used to be a comprehensive secretary of the government, familiar with the government's operation process and working ideas, proficient in official document writing and processing, engaged in public examination training for five years, and taught the examination and interview classes.