Commoner from a Poor Family

Suddenly traveled to ancient times, there was no food and clothing, and it was still an era of war and turmoil. The population was seriously insufficient. In order to solve the population problem, the government forced marriages and married a delicate daughter-in-law. How could she raise two people if she couldn't support one person? What? Foreign enemies have invaded again? The daughter-in-law was shivering, and the villagers spontaneously formed a civilian army to defend their village. Don't be afraid. If you learn mathematics, physics and chemistry well, you won't be afraid of traveling all over the world! Prairie barbarians? Overseas barbarians? Come and fight one, come and fight a pair!