Although Luo Guanzhong's Romance of the Three Kingdoms is considered false, his cleverness is undeniable.
He has several advantages.
1 In-depth study of meteorology (Borrowing from the East Wind)
Familiar with marching array method ("eight arrays")
3 comprehensive thinking (let Guan Yu see Cao Cao, surround Sima Yi and his son with fire before the rain, and let the old father-in-law rescue Lu Xun trapped in the stone array ... nothing more than not letting the situation of the Three Kingdoms break down and letting Shu perish. Because Shu is the weakest of the three countries, it can only survive by the struggle between Wei and Wu.
Loyalty is not only the original oath in the cottage, but also to death.
This is my evaluation of him.