Beijing closed some public spaces and stepped up checks at others on Thursday, as most of the Chinese capital's 22 million residents turned up for more mass Covid-19 testing aimed at averting a Shanghai-like lockdown.WATCH MORE: https://thestartv.com/c/newsSUBSCRIBE: https://cutt.ly/TheStarLIKE: https://fb.com/TheStarOnline