Jiang He is the only person in the company who wakes up early every day to cook. She brings a lunch for each of her three colleagues, collecting 520 yuan per month, covering shopping, cooking, portioning, heating, meal reservation, and dietary restrictions. New colleague Xue Yao's remark, "You even want money?", makes the three suspect her of taking price differences, forcing refunds and setting up a receipt QR code to check the accounts. Jiang He calculates one year of ingredients, rice, oil, gas, and ice packs item by item, discovering that she has been subsidizing them all along, with each person actually shorting her by 120 yuan. From then on, she only cooks her own meals.