Mah Jong Quest III allows players to experience more than 800 different puzzles and 72 levels in the "quest mode" setting. The 12 butterflies level in Mah Jong Quest III is notorious for tripping players up, but by implementing a simple strategy you can overcome this level.
Use the magnifying glass to locate and identify Ying and Yang. These can typically be found in the centre of the screen in the middle of the bottom row.
Free the space adjacent to the Ying and Yang by using the butterflies to lift up the surrounding tiles.
Use all twelve butterflies to lift the tiles, then click on the spaces surrounding Ying and Yang to free them and beat the level.