Compulsory Course on Time and Space Migration

Travel through ancient times? Take the required courses first. [Hard-core farming + infrastructure hegemony + behind-the-scenes mastermind + invincible knowledge] Escape from drought? I pointed casually: "If you dig down from here, there must be a sweet spring!" When the clear spring gushes out, I become the god of the whole village. Barbarian invasion? With a wave of my earthen kiln, I produced fine steel: "Under the sword, heads are rolling!" When the enemy chief was decapitated, I became the shield of the empire. The emperor wants to take away my technology? I smiled slightly and took out the black powder formula: "Your Majesty, this will explode." They thought I was an auspicious person descended from heaven or an immortal descended to earth. Little do you know, I am just a knowledge porter from modern times. From drilling wood to make fire to the roar of steam, from slash-and-burn farming to iron ships. I want to use this torrent of knowledge that spans thousands of years to build my own civilization in this ignorant land! Princes, generals and prime ministers, would you rather have the seed? This time, the entire era will become my testing ground!