What does the model designation National V mean?

[MaryLynn]

It indicates that the vehicle's exhaust emissions comply with China's National Phase V emission standard for gasoline vehicles, where 'V' stands for five in Roman numerals, determined by the level of harmful substances in the fuel exhaust. Below are specific details about the National V emission standard: 1. The National Phase V emission standard was fully implemented nationwide starting from July 1, 2017; 2. The National Phase V emission standard is equivalent to Europe's Euro 5 emission standard; 3. The requirements stipulate that for every kilometer driven, the vehicle must emit no more than 1000 milligrams of carbon monoxide, 68 milligrams of non-methane hydrocarbons, 60 milligrams of nitrogen oxides, and 4.5 milligrams of PM fine particulate matter.