Which episode is the shit in the model room?

In the seventh episode, there is a story about it. Wang Zijian and Yu Hualong are taking big clients to look at houses in high-end residential areas. Wang Zijian suddenly noticed that the customers nearby were furious and cursing, and Fang Sijin and Loushanguan followed the customers dejectedly. Wang Zijian suddenly realized that there was something wrong with the model house. He tactfully asked Yu Hualong to show the customers the garden design of the residential area first, and then rushed into the model house to check it himself. Wang Zijian fought back his nausea and called the property to open the sluice. Then he cleaned the bathroom. After doing this, Wang Zijian called Yu Hualong and asked him to show the client the house.