Core Viewpoint - The Guangzhou Municipal Government has announced a ban on "black smoke vehicles" effective from August 22, 2025, as part of its ongoing efforts to improve air quality and public health [1] Group 1: Policy Announcement - The new regulation prohibits black smoke vehicles from operating on roads within the administrative area of Guangzhou, with enforcement by traffic management authorities [1] - This announcement extends the previous regulation that was effective from August 22, 2020, and emphasizes a "zero tolerance" approach towards black smoke vehicles [1] Group 2: Definition and Impact - "Black smoke vehicles" are defined as those emitting visible smoke or having a smoke density exceeding Level 1 on the Ringelmann scale, including both local and non-local vehicles [1] - The initiative aims to strengthen regulatory measures against high-emission and high-pollution vehicles, thereby improving environmental air quality and ensuring public health [1]