Already ahead on time, the first Chinese Communist Party meeting with Mao Zedong, took place in Shanghaï. In 1949, after the Nationalists defeat, Shanghaï became a Communist bulwark, from where Cultural Revolution started.
Necessarily, the Communist propaganda is present in the city since then, although the Mao' s effigy merchandising is taking over traditionals over propaganda posters.

Déjà en avance sur son temps, c'est à Shanghaï qu’aura lieu la première réunion du parti communiste chinois avec Mao Zedong. En 1949, après la défaite des nationalistes, Shanghai devient un bastion communiste...