Recently, the ministry of ecology and environment issued the announcement on the issuance of three national pollutant emission standards, including the "limits and measurement methods of smoke emission of non-road mobile diesel engine" (no. 51 in 2018). Announcement, points out that to carry out the environmental protection law of the People's Republic of China "and the law of the People's Republic of China on the prevention and control of atmospheric pollution, prevention and control of motor vehicle and the road mobile mechanical exhaust pollution to the environment, is now approved" road mobile diesel mechanical exhaust smoke limits and measurement methods of the petrol car emissions limits and measurement methods (double idle speed method and simple gasoline-fuelled vehicles), the diesel emission limits and measurement methods (free acceleration method and load reduction method) for the national environmental protection standards, and by the ecological environment and the national market supervision and administration of taxation jointly issued.

       Among them, "Non-road Mobile Diesel Engine Exhaust Smoke Limit and Measurement Method" (GB 36886-2018) is applicable to agricultural machinery and will be implemented on December 1, 2018. This standard specifies smoke limits and measurement methods for off-road diesel mobile machinery. This standard is suitable for smoke emission test of off-road diesel mobile machinery and on-board diesel engine equipment. The new production and import of off-road diesel mobile machinery exhaust smoke inspection reference use.

http://www.amic.agri.cn/nxtwebfreamwork/upload/20181114092909855.pdf