Jiaxing ambulance is used to send patients for rent. The general charge for ambulance emergency transport of patients for short distance transportation ranges from 600 yuan to 1000 yuan, and the charge for long-distance transportation is generally 7 yuan to 10 yuan per kilometer. Long distance heavy truck with serious illness is priced at 8-10 yuan per kilometer. If the medical staff try to deduct 1 yuan per kilometer independently.