腹心相照

Explanation: Hinterland: heart; photo: mapping, see. To really meet. Analogy is very intimate with each other, to affiliated level. 　　Source: Ming Feng Meng "Jingshitongyan" Volume name of this friend only a few color End Results were compared, that the confidant; hinterland to shine on those, that the intimate; complain Xiangqiu persons, that the listener. "