谊不容辞

Explanation: Still made obligatory. Moral decline is not allowed. 　　Source: Ming Yang Rong, "Preface to send Chen Businesses" to the world at three years and light men, and friendship can not be resigned, it is in the order of the case. " 　　Examples: This article is Mr. T wanted me to do, because that collection and he has a relationship to G-Books published. I ~, had to write this. ★ Lu Xun's "northern and southern mobilization <Shou Chang Collection> Inscription"