心如坚石

Explanation: Heart as hard as stone. Hard-hearted analogy or will very firmly. Concentric as stone. " 　　Source: Ming Feng Meng "Jingshitongyan" 35th volume have a kind of men do not admire the color, women do not Huaichun, Chi than gold, a heart like a flint, and gratuitous by others stir up, _set_ ring _set_ _set_, temporarily lost the handle, falling into the surgery, after Huizhiwuji. "