Wooden Path Of Nourishment Diggy Dragon Wood China 's Help

I completed the rest of the game, left this for last and can't figure it out. By the way i need help not another riddle to solve. I am stuck on this part.

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Wooden Path of Nourishment Dragon of Wood China Diggy's Help

Can someone help by explaining what i need to do?

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I am in wooden path of nourishment in china.I'm having a problem with my game. Got the bottom part but the.Can't figure out portion of wooden path where it says only symbol of the elements of the female principle yin will show you the goal which is a silver block behind a green door.

I don't think that red stone should be moved.I'm supposed to place a red stone in it's correct place, but for some reason i can't get it to move. Look at the picture below.You cannot illuminate both crystals at the same time, only one after the other.