When did the Beijing National VI emission standard come into effect?

[MacLyla]

The Beijing National VI emission standard was implemented on January 1, 2020. Here is relevant information: 1. Classification: Currently, the country divides the "National VI Standard" into two phases, "National VI a" and "National VI b", with plans to implement them nationwide uniformly in 2020 and 2023, respectively. 2. Introduction: The National VI Standard, or the "National Sixth Stage Emission Standard for Motor Vehicles", is established to enforce environmental protection laws, reduce and prevent vehicle exhaust pollution, protect the ecological environment, and ensure human health.