The classic lines are: the back waves of the Yangtze River push the front waves, the new people in the world drive the old people, shine on you is better than blue, the back waves of the Yangtze River push the front waves, the back waves of the Yangtze River push the front waves, and the front waves die on the beach.

The waves behind the Yangtze River push forward the waves, which means that people and things newly accumulated to a certain extent promote the development of old people and things in some way. It can also mean that new people with certain qualifications are better than old people and old things.

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This ancient poem first appeared in Liu Fu's argumentative essay Qing Suo Gao Yi in the Song Dynasty. The original text is "I heard an ancient poem saying:' The waves behind the Yangtze River push the waves before, floating new people for the old. ""So, you can see that he didn't write this poem, but he quoted it.

The original poem can't be tested, so the first sentence after the sentence "The waves behind the Yangtze River push the waves before" is: "The new one is replaced by the old one."