In Changsha, it is a very heavy job to run 70 takeout orders every day, which requires long-term walking, cycling or driving. Running 70 bills a day is a very heavy job for salespeople, and it takes a long time to walk, ride a bike or drive, which is very stressful physically and mentally. The food delivery staff needs to complete a number of food delivery tasks in a short time to ensure the speed and quality of food delivery, and also need to ensure their own safety and obey traffic rules.