Because what is written on Zhuge Liang's stone tablet is: After long live, the one who defeats me will pass this. When Zhang Xianzhong saw these words and recalled Zhuge Liang's life and what he had experienced, he knew that he was destined to fail and that he was not far from death. Although this may be the superstition of the ancients, what happened later made people wonder whether history was really written in the dark.
After long live, whoever defeats me will pass this. The simple meaning of this sentence is that in ten thousand years, a person more powerful than me will pass by here. To put it more bluntly, Zhuge Liang feels that no one can surpass him in ten thousand years. When Zhang Xianzhong saw this sentence, the first thing he thought of was that he could not defeat Zhuge Liang, so he felt very worried in his heart. Furthermore, Zhang Xianzhong was familiar with the history of the Three Kingdoms and knew that Zhuge Liang was an expert in predicting events and that his predictions rarely failed to come true, so he knew that he was going to fail.
The main purpose of Zhang Xianzhong's killings in Sichuan was to accumulate strength in an attempt to launch another attack on the Central Plains and complete a greater cause. Seeing that Zhuge Liang left a stone tablet predicting the future, he knew that his entry into Sichuan this time was destined to be a road of no return! After Zhang Xianzhong experienced this incident, he was not only defeated by the Qing army, but he also killed people aimlessly, even some of his closest people. This caused the morale of the army to be disorganized, and many of the people he accepted were also killed. They ran away and took refuge in the Qing army, and soon their own strength was very weak.
While approaching a Qing army camp for reconnaissance, he was shot in a vital part by an arrow from a Qing army archer and lost his life! It also corresponds to the sentence "My life is at stake!" Therefore, maybe this is Zhuge Liang's words coming true, maybe Zhang Xianzhong's fate has already been written by a pair of invisible hands.