Transmigrating to an Ancient Age of Chaos and Famine, I Marry into the Mountains to Survive

[Farming + Natural Disasters + System + Interdimensional Trading + Infrastructure] Yu Xia, a person raised in peacetime, somehow transmigrates to an ancient era plagued by war and relentless natural disasters. How the hell is anyone supposed to survive here? Her father is bedridden after being injured while saving someone, her little brother is too young to support the family, and their food is running out! "Ding! Congratulations, Host! Your Fresh-Tasting Farmhouse Goods Shop has reached Level 2!" "Ding! Congratulations, your shop has reached Level 2! As a reward, you can now see the weather forecast for the next three days!" "Ding! Congratulations, your sales have exceeded 10,000 System Coins! You have earned one lottery draw!" "Ding! Congratulations, your sales have exceeded 15,000 System Coins! You have earned one lottery draw!" The System's nonstop dinging left Yu Xia completely stunned. She won't starve! She won't starve!