"Life is not a hundred years old, but how to live to be a hundred years old" comes from Liu Ming Bowen's Song of Lu Lu. People's life is limited, so there is no need to expect too much from it, let alone pursue the illusory goal of immortality. The meaning of life lies not in the length of life, but in the quality of his life and his contribution to society. Otherwise, even if you live forever, life is meaningless.
"Heroes from ancient times have all returned to the mountains" comes from Liu Ming Bowen's Song of Lu Lu. No matter how powerful and arrogant people were at the beginning, they will inevitably die. It is intended to persuade people to look down on fame and fortune, without being so persistent and painful.