Light-duty Vehicles Emissions Standards

In 2016, China released the Stage 6 Limits and Measurement Methods for Emissions from Light-Duty Vehicles (GB18352.6—2016). This standard applies to light-duty vehicles (M1, M2, and N1 categories up to 3,500 kg of maximum mass) powered primarily by gasoline or diesel. 
The Stage 6 standard contains two sets of fuel-neutral emission limits — China 6a (set to be effective from July 2020, implementation delayed to January 2021) and 6b (effective from July 2023) — for air and climate pollutants, including carbon monoxide (CO), total hydrocarbons (THC), nitrogen oxides (NOX), particulate matter (PM), particle number (PN), and nitrous oxide (N2O). The Stage 6 standard shifts from the New European Driving Cycle (NEDC) to World Harmonized Light Vehicle Test Cycle (WLTC) and World Harmonized Light Vehicle Test Procedures (WLTP).

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