Digitization of Tiandao

The protagonist travels to the world of immortality and discovers that this world is essentially a buggy MMORPG. Others can't see the data panel, but he can see it - including the hidden value of the NPC's favorability, the true efficiency of the technique, and the refresh time of the secret realm. He has extremely poor qualifications (F-level account), but relied on information asymmetry and extremely cautious operations to climb to the top step by step.