Suitable for setting up stalls to sell oysters and renting houses on the first floor. It is very convenient to set up a stall on the first floor to purchase goods, which saves a lot of time and cost in carrying goods. Selling oysters on the first floor is also convenient for customers to buy things. Customers in conspicuous places can see at a glance that the better the business, the greater the attraction. Setting up a stall on the first floor has little interference with neighbors, while setting up a stall on the high floor will affect neighbors' lives and bring inconvenience.