As the Ming Dynasty crumbled, chaos erupted across the land. Liu Zhisheng, stationed at Yuling, commanded tens of thousands, intending to cross south. Suddenly, a corpulent man appeared seeking an audience, his robes thrown open to reveal a bare belly, carrying an air of otherworldly detachment. Liu Zhisheng spoke with him and was greatly pleased, asking his name, to which the man replied, "Caiwei Weng." Liu Zhisheng invited him to stay with the army and offered him weapons.

Caiwei Weng demurred, "I possess my own arsenal; no need for such courtesy." Liu Zhisheng inquired, "And where might this arsenal be?" Caiwei Weng rolled up his outer garment, exposing his stomach. Before him was a navel vast and round as an egg. With a slight exertion of breath, the hilt of a sword emerged from the center of his umbilicus. He tugged gently, and a blade as bright as frost slid forth—a truly keen treasure sword. Liu Zhisheng was astounded and asked, "Are there other weapons?"

Caiwei Weng patted his abdomen. "This is my armory; what weapon do I lack?" Liu Zhisheng commanded, "If that is so, produce a bow and arrows." Caiwei Weng nodded, inhaled deeply, and from his navel emerged a magnificent war bow. With a slight exhalation, an arrow flew out. A moment later, with a series of sharp ding-ding sounds, arrows streamed from his navel, raining onto the ground in an endless supply. In a brief moment, Caiwei Weng lifted the sword and the quiver of arrows, tucking them back into his umbilicus.

Liu Zhisheng was utterly mesmerized. From that day forward, he shared meals and quarters with Caiwei Weng, holding him in the highest regard. Though the military camp maintained strict orders, the soldiers were little more than a collection of ill-disciplined riffraff, frequently raiding and harassing the common folk. Caiwei Weng observed, "Discipline is the soul of an army, General. Commanding tens of thousands, if you cannot instill true awe, the day of your defeat is not far off."

Liu Zhisheng agreed, "Your words hold truth, Master. The matter of restoring military discipline, I entrust entirely to you." Caiwei Weng readily accepted, inspected the camp, and decreed that any soldier found harassing the populace would face immediate execution. The most brutal officers and hardened villains were the first targeted; heads fell one after another, none meeting a clean end.

This sudden severity ignited the fury of the ranks. The senior generals drafted a joint petition: "Caiwei Weng is a sorcerer. Since antiquity, renowned generals have led by strategy, not by establishing authority through black magic. Swordsmen and immortals alike eventually meet ruin. Now, countless innocent soldiers have been slain, and morale is explosive. If the General continues to keep company with this demon, his own life is in danger. It would be wise to execute him at once."

Liu Zhisheng remained silent for a long time before stating, "This matter, you decide amongst yourselves; I will not intervene." The generals took their leave and led their troops to Caiwei Weng's quarters. They found him asleep on his cot, snoring like thunder. The men rejoiced, surrounding the tent completely. Two soldiers stepped forward with blades drawn and severed Caiwei Weng’s head. As they pulled back their swords, the head settled back onto the neck without seam or scar, completely unharmed. The crowd gasped in shock. They then sliced open Caiwei Weng’s stomach; the abdomen tore open, yet no blood flowed. Inside, spears were stacked like tall grass, and weapons piled up like mountains—countless, endless. One soldier, summoning his courage, cautiously prodded a spear tip with a long shaft. Suddenly, crossbow bolts fired in unison, arrows shooting wildly. Several men, caught completely unaware, fell dead on the spot. They peered closer, only to find that Caiwei Weng had vanished entirely.