I Have a Rune System

In the long river of history, time travel is by no means a privilege exclusive to modern people. The protagonist travels to an era that does not exist with the rune system in his hand, worships Shennong as his teacher, recruits Jiang Ziya as his military advisor, skillfully controls the locust plague, angrily angers Zhang Liang who is indifferent to worldly affairs and disregards the life and death of the people, marches and sets up battle formations, and engages in an intellectual duel with Zhuge Liang, etc. This is a fantasy novel where the main character has an online IQ, is capable and can pretend to be relaxed, funny, and strategic.