CHINA has started to censor on social national all information related to the Coronavirus from 31 December 2019. An in-depth study carried out by Citizen Lab, an interdisciplinary laboratory in the Munk School of Global Affairs at the University of Toronto (Canada), has confirmed in every detail how it was managed the governmental action on the instant messaging service WeChat (1,1-billion users) and the video platform YY (more than 300 million users).