What are the symbols for China 5 and China 6?

[XavierFitz]

China 5 and China 6 are represented by English symbols, with China V and China VI denoting China 5 and China 6 respectively. The differences between China 5 and China 6 are as follows: Emission Limits: The China 6 standard imposes approximately 40% to 50% stricter emission limits compared to China 5. The emission levels under China 6 are significantly lower than those of China 5. Simply upgrading engine technology as before to meet emission standards is unrealistic. Achieving China 6 requirements necessitates comprehensive optimization approaches, such as integrated improvements (or additions) including the engine, PDF, particulate filters, and other components. Fuel Neutrality: China 6 adopts the principle of fuel neutrality, meaning that regardless of the fuel type used, the emission limits remain the same. In contrast, during the China 5 phase, diesel and gasoline vehicles had different emission standards. Emission Standards: Compared to China 5, the China 6 standard reduces nitrogen oxides by 77% and particulate matter by 67%. It introduces limits on particulate number (PN) and imposes stricter requirements on the durability of emission control devices and On-Board Diagnostics (OBD) systems.