catering service operators can enrich the menu information by marking the food weight and suggested number of consumers on the menu, etc. catering service operators can enrich the menu information by marking the food weight, specifications and suggested number of consumers on the menu, provide ordering tips for consumers, and provide public chopsticks and packaging services according to consumers' needs. Catering service operators can enrich the menu information by marking the food weight and suggested number of consumers on the menu. Catering service operators can enrich the menu information by marking the food weight, specifications and suggested number of consumers on the menu, provide ordering tips for consumers, and provide public chopsticks and packaging services according to consumers' needs. Catering service operators can enrich the menu information by marking the food weight and suggested number of consumers on the menu. Catering service operators can enrich the menu information by marking the food weight, specifications and suggested number of consumers on the menu, provide ordering tips for consumers, and provide public chopsticks and packaging services according to consumers' needs.