How is Cao now?

It's good. Cao, male,1born in April, 1956, is from Poyang County, Jiangxi Province. He used to be a professor and doctoral supervisor at China Institute of Historical Geography, Fudan University. As of June, 2022, he is currently the director, professor and doctoral supervisor of the history department of Shanghai Jiaotong University, so Cao is very good. His research interests include China immigrants and China population history, environment and disease history, socio-economic history and modern history of China.