Si Ren let the Corpse King go and handed over the secret key to open the portals of Changbai Mountain, which could be considered fulfilling his agreement with the God of Desire.
As for what would happen next, that was a matter for the future.
The primary objective now was to plunge the situation into chaos; the more chaotic things became, the greater the room for maneuver Si Ren would have.
Chapter 951