Introduction to Hidden Spring: Following the sound of water, a waterfall pours down from a cliff more than 40 meters high. The sound of water roars, strong and weak, like the fairy music floating from the heavenly palace. The spring water flows out from between the two stone walls that stand as steep as a screen, like a bride who is full of spring but is secretive, wanting to speak but still shy. This is the "hidden spring" of feminine symbols.