They moved overseas together and he's now a visiting professor at the East China University of Political Science and Law.

WSJ: Luxury Real Estate: Embracing Old Shanghai in a French Concession Lilong

Prof Yang Yuguan and two students at the China University of Political Science and Law make a bold call in Hong Kong Beijing-backed newspaper Ta Kung Pao for China to retaliate against Pyongyang and immediately repeal a mutual assistance treaty signed in 1961.

BBC: China media: Political models

Ni Lexiong, a military naval expert at the Shanghai University of Political Science and Law, believes China's alleged radar moves were a "face-off" between the two countries and "a warning to Japanese vessels", South China Morning Post reports.

BBC: China media: Pyongyang warned