China Reveals Key Powers in Hong Kong National-Security Law

HONG KONG—Beijing plans to vest by itself with essential powers to implement countrywide security in Hong Kong, proposing a law that would allow the central governing administration to supervise the policing of subversive things to do in the protest-racked city and, in some instances, intervene instantly.

State media on Saturday disclosed facts of the proposed countrywide-security law for Hong Kong, which opposition teams and overseas governments together with the U.S. have criticized as gravely undercutting the city’s promised autonomy from Beijing. Senior Chinese…