TV interview on 23May with WION, one of India's leading English TV channels.
The draconian step is precipitated by Beijing's growing concerns about a glaring loophole in Hong Kong's safeguards on national security. These concerns have been intensified by what happened behind Hong Kong's landmark "anti-extradition bill" civil unrests involving mob violence, some bothering on terrorism, and the perceived involvement of subversive foreign forces behind the scenes.
Background to this is provided in a CCTV documentary Another Hong Kong: Exploring the Truth Behind the Controversy Over the Extradition Bill 另一個香港, which was released only days before. This two-part documentary (in Putonghua with some English footage) can be accessed here - Part I Part II