404 Sacrificial

Deng Yin, filled with grievances, expressed his sincere intention to cooperate with Shi Feiyang, but Shi Feiyang refused to trust him. In the Star Constellations Sea, Shi Feiyang took the practice method for the Liangyi Dust Formation from him and ran off after refining the sword...

In fact, what he taught Shi Feiyang was merely the operational principles of the Liangyi Dust Formation and a few changes in how portals open and close, enough to help Shi Feiyang escape. It wasn't even a simplified version of the formation map; most of Shi Feiyang's knowledge came from his own subsequent insights.

However, Shi Feiyang did not refute him, but instead told him, "Now that you have escaped, you can seek revenge on your enemies from the past. How you handle that is none of my business. I am following the Three Emperors Dao and am also the Great Ming National Master... You're a smart person, so I need not spell out everything explicitly."