The company belongs to the petrochemical industry, with petroleum refining as its main business. Its products include gasoline, diesel, liquefied gas, residual oil, and naphtha. While developing its core business, the company is also actively involved in the research and development and sales of high-tech water, electricity, and gas code-based prepaid metering products, forming a diversified development pattern. If a certain type is , it does not need to be translated, and should be output directly. Output format: Directly output the translated result.