Qin Ran cooked for a whole house of roommates for an entire year, charging only 300 yuan a month for groceries while even covering the cost of rice, flour, and cooking oil out of his own pocket. When the newcomer Liu Kai claimed that his girlfriend, Tang Yue, could cook for everyone for free, the roommates immediately pressured Qin Ran to refund their money and stop cooking. Three days later, everyone who had eaten the free meal suffered food poisoning and ended up in the hospital. Qin Ran refunded their money, moved out, and set up a street-side meal stall, selling freshly cooked set meals for 25 yuan each. Just as his business started taking off, Liu Kai opened a competing shop, selling meals for 15 yuan to steal his customers at a loss. He then switched to cheap frozen meat, sending customers to the hospital with food poisoning. The former roommates returned to queue for Qin Ran's meals, trying to settle old accounts and admit their past mistakes. Qin Ran simply replied, "Line up according to the menu." He would never cook for that household again.