Lu Xun was trapped in an eight-array map. Why did Huang save him?
Cao Wei, Wu Dong and Shu Han are three pillars, and at the same time they balance each other. They all know that once the family is dominant, they will be the next to be destroyed. Therefore, although Sima Yi saw through Zhuge Liang's empty plan, in order to protect himself, he deliberately "cheated" to withdraw.
Similarly, when Lu Xun was trapped in the Eighth Array, he knew that Lu Xun had come to the rescue when he heard the news of Huang, and he was worried that Lu Xun's death and Cao Wei's annexation would endanger him. I have to say, Huang Kui is Zhuge Liang's father-in-law, and he is really wily. He let Lu Xun go, eased the relationship with him, and broke Cao Wei's plan to reap the profits.
So, is there Zhuge Liang's inspiration behind Huang's doing this? The answer is obviously yes. Huang was a counselor with great strength and fame in the middle period of Shu. When he married his daughter to Zhuge Liang, he was on the same side as Zhuge Liang. But Zhuge Liang, as the prime minister of Liu Bei, could not let Lu Xun go directly, so Huang came out to help Zhuge Liang.