I Can't Find That Era-Era Lucky Protagonist Novel I Read Before 年代锦鲤文找不到了以前看到过

When the female lead was little, she saved the Dragon King's daughter, who seemed to be a koi spirit. She gave her a pearl or something, and the female lead gained good luck. Her father went from running a business to becoming the richest man, and the family eventually moved into a traditional courtyard house, I think. The male lead's family was rich and influential. He was sent for reeducation through labor, while he and his mother lived in the village and his father and grandfather were on a farm.