故旧不弃

Explanation: Old friends: the old one, under the old unit; discarded: discarded. Not easily abandon old friends, old men. 　　Usage: The main predicate; as predicate; that is not easily abandon old friends, old men 　　Source: Pre-Qin Confucian "Analects XVIII,": "old friends so no big, do not abandon him; without seeking preparation in a man."