宝刀不老

Explanation: Although age has an analogy from our large and long, but the effort did not diminish technology. 　　Usage: The main predicate; as the predicate attribute, complement; metaphor veteran as ever Yong 　　Source: Ming Luo, "Three Kingdoms" 70 back: "Zhang He to lobby, met with Huang, laughed and said: 'You Xu Danian century, still does not know shame, Shangyu Rune yeah?' Loyalty angrily: 'I Shuzi bully old ! my hands of the sword is not old '. " Thesaurus:  old but still vigorous in mind and body, s first heart