When Lu Qingguang, a social worker in Beidiao, returned to her hometown to deal with trivial matters, she accidentally discovered that the basement of her self-built house could connect to the ancient village. Only she could carry her belongings back and forth continuously. When she inspected the ancient market and discovered that "tofu/soap/papermaking", the third most popular technology for time travel, already existed in this time and space, she immediately turned around and decided to "resell" modern industrial products to ancient times to earn the exchange rate difference between the two worlds of gold. However, this business needed to be mastered slowly, so she could only start from the beginning of reselling eggs, and gradually became fat...
