Brick carving introduction: On both sides of the main courtyard are the Tonglou courtyard, which contains exhibition rooms 17-21, where "business events" are exhibited. The 17th exhibition room reflects the scene of the opening of the market, which is very lively, and there is also a song about how Shanxi merchants make money. Exhibition Room 18 explains the situation of apprenticeship and salary, silver stock and body stock. Exhibition Room 19 reflects the grand occasion of the temple fair, as well as ancestors such as Lu Ban, the founder of carpentry, Sun Simiao, the King of Medicine, Du Kang, the Master of Wine, and others. The 20th exhibition room is an introduction to the bid, and also reflects the grand occasion of the singing stage.