后浪催前浪

Explanation: Analogy to promote new things or replace old things, and constantly move forward. 　　Source: Song Xiang "over Tiaoxi" poem: "After just look at the waves, when Wu replacing the old one." 　　Examples: Only taught him ~, Chu Chen assured, I'll never replace the old new. ★ Ming Gu Zhong name "jade comb" First off Thesaurus:  the waves behind drive on those before, so the new excels the old