| City | Date | API | Air Quality Degree | Quality Condition |
| Beijing |
Sep.17 |
62 |
II |
Good |
| Qinhuangdao | Sep.17 | 53 |
II |
Good |
| Qingdao | Sep.17 | 34 |
I |
Very Good |
| Shanghai | Sep.17 | 54 |
II |
Good |
| Shenyang | Sep.17 |
64 |
II |
Good |
| Tianjin | Sep.17 | 70 |
II |
Good |