Chinese

		woman; adult female	heart; mind		seabed	needle; pin; injection
trad. (女人心，海底針)		女人	心	，	海底	針
simp. (女人心，海底针)		女人	心	，	海底	针

Proverb

女人心，海底針

1. A woman's thought process is impossible to grasp (just like a needle at the bottom of the sea is impossible to grasp).