What Lin Wu had done was something he was not fully sure that it would work. Even the system had only told him of a fifty percent probability of success. He had not actually healed Shirong in the complete sense, rather he had used the Unknown energy as a shackle.
Lin Wu had asked the system whether it would be possible to create a unique function that could control the unknown energy and manipulate it while still keeping it in Shirong's core. The system had told him this would be possible, but Shirong may find out about Lin Wu.
But Lin Wu figured since his senses were restrained, this would not matter too much. And even if he did find out that Lin Wu was fully sentient, Lin Wu would easily be able to kill him in his current condition. The interface that the system had created already allowed Lin Wu to leave the ring if he wanted to do so.
