Traveling Across Two Worlds in the Lean Years, I Feed the Whole Village by Picking up Rags

Ye Xiaotao fled for three years and finally died of the plague. When he opened his eyes again, he was back to the time when he was left behind. In her previous life, her younger brothers, sisters, and uncle all died at the hands of refugees. This time she vowed to protect them. Ye Xiaotao took everyone up the mountain to take refuge, but she didn't expect that the strange stone amulet left by her father would be stained with blood and take her to another world. The lights are bright here, everyone has enough to eat, there are carts that don't need to be pulled by oxen, a magical faucet that produces water when you raise your hand, and a black box that emits light and speaks. Ye Xiaotao is like a mouse falling into a rice vat. She buys, buys, hoards, studies, studies, studies, brings modern technology back to ancient times, and accidentally brings back new ideas.