In which year did China 4 emission standard start?

[ElizabethDella]

Except for light-duty diesel vehicles, all vehicles manufactured after July 1, 2011 comply with the China 4 standard. However, some regions implemented this standard earlier, so determining a vehicle's emission standard solely based on time is not entirely accurate. Here's some information about the China 4 standard: 1. Except for light-duty diesel vehicles, other vehicle types specified in the 'Limits and Measurement Methods for Emissions from Light-Duty Vehicles (China III, V Stages)' (GB18352.3-2005) implemented the China V standard on schedule. 2. Starting from July 1, 2011, light-duty gasoline vehicles, single-fuel gas vehicles, and dual-fuel vehicles that did not meet the China V standard requirements were prohibited from being sold and registered.