Poor Family: Hero

What should I do if I suddenly travel to ancient times and I don't have enough to eat? The man is almost finished being beaten, the government has given him a beautiful wife, and he must give birth to a child next year? What's going on? I am still struggling to take the scholar exam, and the barbarians are coming to invade the Central Plains? It doesn't matter, if you are proficient in mathematics, physics and chemistry, you will be able to conquer the world without fear! Are the prairie cavalry unstoppable? Is the Japanese pirate ship indestructible? Joke! The Great Xia Dynasty still has me, let's see if I alone can conquer all powers!