A merchant has seven daughters, each with its own merits! Marriage seekers are like crucian carp crossing the river, but they all follow the merchant’s family rules. The merchant’s family rules: 1. If you marry a merchant’s daughter, the second son must be named Shang. 2. The merchant’s son-in-law cannot take concubines. 3. The owner of the merchant, the owner of Yiyantang, the owner of the merchant, is famous...