This sentence came from the Han Dynasty historian and writer Sima Qian's " Records of the Historian." The original sentence was: " Death is either heavier than Mount Tai or lighter than a feather." The word "Yu" was not meant to be used as "Bi", but the original meaning of "Yu" meant "Bi". The meaning of this sentence was that everyone would die. Some people's death would be as heavy as Mount Tai, while others would be as light as a feather. In other words, everyone's death had value. Some people's deaths would be respected and valued by people, while others 'deaths would be despised or ignored by people. In this sentence,"Mount Tai" symbolized great value and dignity, while "feather" symbolized small value and dignity. This sentence expressed Sima Qian's deep thoughts about human nature. He believed that everyone had their own value and meaning, and that everyone's death had their own destiny and meaning.