剖蚌求珠

Explanation: Cut open the clamshell to get inside the pearls. Parable of the talents to strike a virtuous good. 　　Source: "Three Kingdoms Shu Shu Chuan Qin Mi": "just want to claim jade stone quarry, split clam find beads, Jinnai with, and Bingran, like a bright day, What else suspect indeed!"