How to enable push notifications on Recorder/Camera and enable recieving them on the Hik-connect app based on VCA rules like line crossing or intrusion detection?

From the Recorder’s monitor output GUI, go to :

Menu >>> Camera Setup >>> VCA >>> Choose desired VCA type tab >>> Enable >>> Draw the line or region >>> Click “SET” button >>> Linkage Action (tab) >>> Place check on “Notify Surveillance Center” >>> Click “OK” >>> “Click Apply”

On Hik-Connect app:

Hik-Connect Page option (bottom) >>> Swipe the device to the left >>> Press the cog/gear setting button >>> Alarm Notification set to Enable.