brush up your mandarin
An old painter is quickly losing his vision, but wants to keep working despite being given many opportunities to retire. His boss wants to give younger painters a chance, but the old painter refuses to quit. One day he is assigned to restore a section of the Great Wall that has detailed ancient Chinese calligraphy painted on it. Because of his vision he ends up painting over much of the details in the art and royally screws up. After his boss finds out, he is given a talking to and is immediately fired.
I guess he just couldn’t see the writing on the wall.