How to Determine a Vehicle's Emission Standard Level?

[McDonovan]

You can check a vehicle's emission standard through the following methods: 1. Look at the back of the vehicle's environmental protection compliance label sticker, where the emission standard will be indicated; 2. On the first page of the vehicle conformity certificate where the numbering begins, there is an explanation of the emission standard. However, it does not directly state the national level (e.g., China 4, China 5), but rather a string of characters. You can search online for the meaning of this character string to determine the national emission standard level. Vehicle emissions refer to harmful gases discharged from exhaust, including carbon monoxide, hydrocarbons, nitrogen oxides, PM (particulate matter, soot), etc. These are all harmful gases produced during the engine's combustion process.