"He who knows the times is a hero" means that only a smart and capable person who can recognize the trend of the times can become a hero, and only a person who can recognize the trend of the times can become an outstanding figure.

This sentence comes from Yan Zi's Spring and Autumn Annals. Yan Zi: "Those who know the times are heroes, and those who change their planes are heroes."

Biography of the Three Kingdoms, Shu Zhi and Zhuge Liang Pei Songzhi quoted Xiangyang Ji: "Confucian scholars and common people are knowledgeable and concerned. There are Wolong and Feng Chu here. "

Allusions about "those who know the times are heroes";

Zhuge Liang, a statesman and strategist in Shu of the Three Kingdoms, lived on his uncle Zhuge Xuan after his father died when he was young. My uncle died at the age of sixteen, so I bought some land in Longzhong, west of Xiangyang city, built several houses and studied while farming.

Zhuge Liang lived in Longzhong for ten years. During this period, he read a lot of classic works and works of a hundred schools of thought contend, and gained rich political, military and historical knowledge. He also paid attention to studying the political situation at that time and gradually formed a set of opinions.