Lan Shen and Jin Xuren, who have been friends since childhood, run a Wanshi House together. Wanshiwuwu has never failed in any case it took on, so it has become a myth in the industry. Lan Shen is greedy for money, arrogant, venomous, and loves to show off. He is very deep, thoughtful, and mysterious in his methods. He is very thorough in seeing things and dealing with people. He is also very childish in dealing with people, like a primary school student. He is the main planner of the plan. Ah Ren comes from a famous family with a distinguished and mysterious background. He loves food and always has many dreams. He hopes to earn a lot of money. Big Pharma will give up anything that hinders his happiness, including principles. Mainly responsible for some unimportant parts. Fangyuan is a graduated college student with a very righteous and kind outlook. She has a unique thinking and therefore has unique dreams. However, she is slow to react and cannot quarrel with others because it takes the next day to think of how to respond to a long series of verbal attacks. Hired by Ah Ren as a housekeeper, she is mainly responsible for the sanitation work in Wanshi House, but she also participates in the improvement work of the project, mainly doing things that Ah Ren does not want to do or is inconvenient to do.