Authorities in Hong Kong have revoked bail for former healthcare union chief and democracy activist Winnie Yu, putting her back behind bars on International Women's Day. Yu, 34, had been out on bail awaiting trial for "subversion" under a draconian national security law imposed on the city by the ruling Chinese Communist Party (CCP) from July 1 , 2020. She is among 47 defendants charged with the same offense in connection with an unofficial democratic primary election in the summer of 2020 that was deemed to be an attempt to overthrow or undermine government power because it aimed to maximize…