During the COVID-19 pandemic, community lockdowns were put in place across China to restrict contact, which promotes the prosperity of food delivery services. Food delivery platforms such as Meituan and Ele.me are strengthening the management of deliverymen, and the exploitation of deliverymen has become a serious problem. According to the algorithm made by the food delivery platforms, the delivery person’s performance and wage are largely evaluated by customer ratings. This research aims to study whether altruism and persuasion effect can change customers’ rating behavior, or improve customer ratings in Chinese food delivery market.