Tang dagang , director of the vehicle emission control center , a policy research group also affiliated with china 's environmental protection ministry , said last month that chinese refineries won 't produce cleaner fuel until the higher production costs are addressed by chinese officials .

中国环境保护部政策研究机构机动车排污监控中心主任汤大钢上个月说，在中国官员解决生产成本上涨问题之前，中国炼油厂是不会生产更清洁的燃油的。