Being extremely smart is another matter.
In my understanding, cleverness not only means quick mind and strong learning ability, but also means the ability to assess the situation, know how to advance and retreat, and know the gains and losses. The real wise man is the one who comes out last and has a good end.
Therefore, I am familiar with the wise men: during the period of Emperor Ying Zheng of Qin, the general Wang Jian and his son Sarah, their two fathers and sons destroyed five of the six countries, and the army reached all the forces of Qin, but it was not suspected by Ying Zheng. In the end, it was a good death. Be a wise man.
In the Han Dynasty, Sean and Liu Bang's half-recruited kings, including Xiao He, Han Xin, Peng Yue and others, were all killed. Only he died well and could be regarded as a wise man.
During the Three Kingdoms period, Jia Xu helped Dong Zhuo enter Chang 'an and take control of the world. After Dong Zhuo was destroyed, he helped Guo Si and others break Chang 'an, pulled out the last fig leaf of the Han Dynasty, and helped Zhang Xiu kill Dian Wei and Cao Cao's eldest son, but after he defected to Cao Cao, he was not killed. Finally, I helped Cao Pi, the official to Qiu, and finally died a fair death. Jia Xu is good at doing the right thing at the right time, but he doesn't care about the lives of others.
In the Tang Dynasty, Li Jing eliminated the southern separatist regimes such as Xiao Xian, Tuyuhun and Turks, and became a general. Later, he was removed from the military post and changed to the right servant of Shangshu, that is, the right prime minister, and he was able to die well. I think these people are all smart people.