| Location | Ground-floor door of the stairs near Tak Oi |
| Main site of rusting | The whole body of the shaft |
| Condition | Serious |
A layer of rust is found on the surface of the shaft. The condition inside the layer of rust is unknown, but not slight.
Re-painting is the simplest way to reduce rusting, but it seems to be not very useful, as the surface has been rusted very poorly. Replacement is the most direct way to solve the problem, if possible.