白璧三献

Explanation: Chu Yu Pu and s have the two offered the king, the two feet were cut off the feet. The third king to rule Pu, was white, cut that Bi, the Bank said, "and Choi." Metaphor does not know the good timber or underappreciated. 　　Source: See "Han Feizi and s." 　　Examples: Mingzhuantou anti-An Jian, ~ has been cut off the feet. ★ Ming He Jingming "Tian-line"