I travel back and forth between ancient and modern times, hoarding goods to raise my grandchildren a

Raising grandchildren at 18 can save you decades of hardship. Take, for example, 18-year-old Yu Wanwan, a fake heiress who, after being kicked out of her wealthy family, acquires a "time-travel, raising children to get rich" system. She's transported to ancient times, becoming the grandmother of six grandchildren. However, the dynasty she arrives in is facing famine, with people going hungry nine times in three days. Fortunately, she uses the system to travel back to the modern era to stockpile supplies, not only feeding her own grandchildren but also the children of the capital. She becomes the grandmother the children of the capital most desire. Even the emperor, older than her, shamelessly calls her "grandmother" just to get some food from her. To ensure her grandchildren...