China Petroleum and Chemical Corporation holds the position of the country's top supplier of refined oil and petrochemical products, as well as its second-largest producer of gas and oil. It is the second-biggest chemical company and the largest oil refinery in the world. It is ranked fifth among the Fortune Global 500 companies for 2022 and second in the world in terms of the total number of gas stations. 

• Gas stations are breaking the law by letting drivers pay with their phones next to the pumps, which compromises the security of refueling. 
• Convenience stores experience traffic jams when customers must wait in line to pay bills and make payments.

For example, Seuic explosion-proof mobile computers are used by gas stations for cashiering, which expedites data statistics and lessens employee workloads, thereby lowering management costs and increasing work efficiency; for customers, one-click refueling and one-click invoice issuance provide convenience and safety while cutting down on wait times.

The efficiency of the mobile computer cashier at the convenience store is more than eighty percent higher than that of the original cashier.