By measuring the energy efficiency of the old station building, calibrating the gas to electricity ratio, and calculating the energy-saving ratio after investing in new equipment, the customer determines the mode of self procurement after calculating the return on investment.

By measuring the energy efficiency of the customer's old station building, calibrating its gas electricity ratio, calculating the energy-saving ratio, agreeing on the electricity bill, signing an agreement with the customer, and achieving energy-saving through station building renovation, the energy-saving part is shared with the customer, benefiting both parties.

Agree on the selling price per cubic meter of compressed air and the customer's electricity cost, calculate the revenue based on the amount of gas used by the customer and the electricity consumed by the station building, and the customer pays according to the amount of gas used.