Zhuge Liang wept bitterly. What does this article about Pang Tong and Zhang Yi's just explanation of Yan Yan say?

Articles? Never heard of it. I only know that this is an era in the romance of the Three Kingdoms. The content is about Pang Tong, a strategist of Shu (Liu Bei's country), who died heroically in the battle between Sichuan and Liu Zhang. Liu Bei had no choice but to ask Zhuge Liang in the base camp (Jingzhou) to take the lead. So Zhuge Liang expressed his grief for Pang Tong and took Zhang Fei to Sichuan to help Liu Bei. They went separately, and Zhang Fei went by land, which was a long way. Zhuge Liang is close at hand by water. Zhang Fei (Zi Yide) subdued a respected veteran named Yan Yan with one stroke in Sichuan, so the old general waved his hand and everyone surrendered without fighting along the way. With the help of the old general, Zhang Fei arrived before Zhuge Liang and made great contributions. This time, it mainly describes that Zhang Fei will use tricks to make him highly restrain himself and stimulate his potential for the overall situation. It also expresses that people should know themselves and know each other, not be greedy and enterprising, be slow and steady, work together for the same goal step by step, and not take risks for comparing the merits and demerits.