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. 2025 Aug 1;13:1632713. doi: 10.3389/fpubh.2025.1632713

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Copyright © 2025 Jing and Xiaofeng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Scatter plot showing the Air Quality Index (AQI) from January to December, represented by various shapes and colors. The AQI ranges up to 400 on the vertical axis, with dates on the horizontal axis. Key indicates different months. Heating and non-heating periods are noted in a box. — The scatter plot of AQI index in Urumqi.