CCTV
| Date | Clue |
|---|---|
| 2025-09-11 | Video surveillance letters |
| 2024-07-30 | Security camera inits. |
| 2024-03-07 | Security camera letters |
| 2024-02-25 | Letters on security camera footage |
| 2019-08-06 | Means of surveillance, for short |
| 2019-01-02 | Security guard's viewing, for short |
| 2018-01-28 | Letters on a video surveillance screen |