Mnemonic symbol: a treasure chest.
Gitta Giraffe (gu) and the crab (贝) found a treasure chest (贵) in the Eiffel Tower's bathroom (ei4). Inside of the chest they found a very precious dart board (中) and flutes (一) made out of gold; they mistake the flutes for darts and play a game of darts throwing the flutes at the very expensive (贵) dart board.