not less than 71%. It is required that the entrance rate of school meals is not less than 71%, that is, the cost of purchasing raw materials should reach 71% or more of the meal expenses, and the annual balance should not exceed 4%, allowing school canteens to have zero balance or appropriate negative balance. The entrance rate is the ratio of entering the canteen to the number of views. Today's payment rate is the proportion of today's payment to all payment amounts.