青枝绿叶

Explanation: ① green foliage. Trees that grow more lush. ② metaphor young. 　　Source: Ming Wu Cheng-en, "Journey to the West," the twenty-sixth time he pulled my willow leaves to go to, on the alchemy oven, Sunburn was parched, has sent me, I took in a vase, a day and night, re- have greenery and the old the same. " 　　Examples: Monkey head and said, 'old, ah, my boy, if you like ~ age, not to mention the fifty beard, that is, five hundred, thousand, but also resist. '★ Zhou Libo, "Storm" the first nineteen