锈
=
钅
+
秀
:
Marie Curie (xi) is demonstrating in a talent show (秀) in the outhouse's bathroom (ou4) how she can magically remove the rust (锈) from a golden harpoon (钅) by dipping it in the toilet. Her secret is that she poured the right chemicals in the toilet earlier.
Marie Curie (xi) is preparing for her performance (秀) in a talent show (秀) in the outhouse's bathroom (ou4). She will be juggling lots of bowls of cereals (禾) without spilling the cereals. Her secret is that she convinced a poltergeist (乃) to help her, which will make itself invisible during the show and handle the cereals for her.
a "screw that never rusts" — sb who selflessly and wholeheartedly serves the Communist Party, like Lei Feng 雷鋒|雷锋[Lei2 Feng1], to whom the metaphor is attributed