Its QA and QC system were recognized by the DNN association and became one of the earliest gas companies in China which have registered the ISO9002 with the ISO international standard.

• 其运作良好的质量保证体系顺利通过了挪威船级社DNN基于ISO9002国际标准的审核，成为国内气体行业中最早通过此认证的公司之一。