Professor Shuji Cao recently retired from Shanghai Jiao Tong University, where he founded and served as a Distinguished Professor in the Department of History. His expertise and research focus on various areas, including immigration history, population history, environmental history, disease history, and socio-economic history of China, with a specific emphasis on land reform. His contributions to the field of Chinese population history are widely recognized, particularly through the creation of a comprehensive database that has greatly benefited numerous scholars.