长江后浪推前浪

Explanation: Analogy of things continually advance. Replace the old one, multi-fingered Xinrenxinshi old things. 　　Source: Yuan Prince "strayed into the Taoyuan" second off: "Oh, arrived in the number of the Yangtze River water, superseding the old, spent Oh XAC as early as one piece of the East, the years rush.