At the entrance of the coal mine, Chen Dehai insists on freshly cooked, genuine ingredients, selling for 15 yuan a portion. His son Chen Liang sets up a rival stall, attracting workers with a low price of 9 yuan and heavy flavors, squeezing out his father by leveraging Wu Tiangui's connections. To maintain the low price, Chen Liang continuously cuts costs, and food quality gradually develops problems, leading to multiple workers feeling unwell, the project being blocked, and partners holding them accountable. After being driven away, Chen Dehai still relies on his craftsmanship to gain the trust of drivers and workers. Zheng Wei invites him back, and Chen Dehai puts forward clear regulations: limiting portions, clearly marked prices, guaranteeing freshness, and queueing to buy. Chen Liang and Wu Tiangui bear the consequences, Chen Dehai reopens his stall, and the workers also realize that cheapness cannot replace safety.