In which year was the China 5 vehicle standard implemented?

[VivienneFitz]

China 5 standard, the fifth-stage national motor vehicle emission standard, was implemented nationwide on January 1, 2017. Below is relevant information about emission standards: 1. China 5: The fifth-stage national motor vehicle pollutant emission standard, also known as "China 5 standard," has an emission control level equivalent to the European Union's fifth-stage emission standard currently in effect. The EU has been implementing this standard since 2009, which imposes stricter limits on motor vehicle emissions such as nitrogen oxides, hydrocarbons, carbon monoxide, and suspended particles. From China 1 to China 4, each upgrade in the standard reduces single-vehicle pollution by 30% to 50%. 2. Compared to China 4 standard: The new standard can reduce nitrogen oxide emissions by 25% for light-duty vehicles and by 43% for heavy-duty vehicles. Based on Shanghai's annual vehicle registration volume of approximately 350,000 units, it is estimated that annual new vehicles can reduce nitrogen oxide emissions by about 1,000 tons per year. Additionally, the emission control level of China 5 standard is equivalent to the fifth-stage emission standard currently implemented in Europe.