The Lu family is a not-so-famous family that makes a living by divination. The Lu family has never been famous in the world, but they have never had any accidents. The Lu family has a rule that when a man of the Lu family reaches eighteen years old, he must leave the Lu family and work outside the family until he is qualified to inherit the family business.
The Lu family has this rule when traveling in the world: "First, the customer is God. To the Lu family, God is a thing that has money and is worth cheating. Second, everyone who is stronger than themselves must show respect, mainly by hugging their thighs and calling them big brother. Third, when you go out to travel, you must not carry your conscience with you. The Lu family has specially set up a test for this."