青
=
龶
+
月
:
Mnemonic symbol: a cyan-colored fountain of youth.
青
=
龶
+
月
:
The moon opened a very profitable start-up in front of the engine. He put up a fountain of youth and--wearing a fancy headdress--charges the Queen of Hearts a fortune for drinking from the fountain.
copper (chemistry) / see also 紅銅|红铜[hong2 tong2] / CL:塊|块[kuai4]
铜
=
同
+
钅
:
Tommy Turtle (tu) runs a copper (铜) mine in the engine's kitchen ((e)ng2). He managed to force two twins (同) to work for him and mine the copper using golden harpoons (钅).