November 4, 2014, a reporter from the China Internal Combustion Engine Industry Association, in order to implement the State Council on "Atmospheric Pollution Prevention Action Plan" (Guo Fa No. 37 document), the State Council on "Accelerating the energy-saving environmental protection industry" (State 30 document), "the State Council on Strengthening the Internal Combustion Engine Industry energy saving advice" task (State Council on the 12th file) requests, strengthen diesel engine reducing aqueous urea nitrogen oxides (hereinafter referred to as "car with urea solution." ) manufacturing enterprise product development, manufacturing and stable implementation of scientific quality management, standardize industry market order and safeguard the legitimate rights and interests of users and inhibit investment in low-level and repeated construction, China Internal Combustion Engine Industry Association partially aqueous urea manufacturing companies, automotive diesel engine production Manufacturing Engineering Technology Research Center exhaust after treatment business and industrial machinery internal combustion engines, in extensive consultations and discussions on the basis of research, preparation of the "diesel engine aqueous urea nitrogen oxide reducing manufacturing conditions and product quality supervision and management approach" and the " Diesel engines aqueous urea nitrogen oxide reducing manufacturing conditions and product quality supervision and management approach to the implementation details, "a clear performance standards, objects, and responsibility, and manufacturing companies should have the conditions, product demand, distribution and management as well as identification markers Supervision and management strictly limited.