What does the opening words of The Romance of the Three Kingdoms mean?

The Yangtze River flows eastward, and the waves wash away heroes. Whether it is right and wrong or failure, it is empty now and has disappeared with the passage of time. Castle Peak still exists, the sun still rises and the sunset still sets. The white-haired hermit by the river has long been used to the changes of time. I met an old friend and had a drink. How many things have happened since ancient times are jokes. The world-famous historical novel Romance of the Three Kingdoms was written by Luo Guanzhong (1330- 1400) in the late Yuan Dynasty and early Ming Dynasty. But the word "Linjiang Xian" in the frontispiece was not written by Luo; It was written by Yang Shen (1488- 1559) who was born 88 years after Luo Guanzhong's death. Luo Guanzhong comprehensively edited and created the Romance of the Three Kingdoms according to the History of the Three Kingdoms written by Chen Shou, a historian in the Western Jin Dynasty, the Book of the Later Han Dynasty written by Ye Fan, the Pinghua of the History of the Three Kingdoms written in the Yuan Dynasty and some related legends. His book was published in Jiajing period of Ming Dynasty. * * * 24 volumes and 240 articles. At that time, there was no frontage "Linjiang Xian". In the early Qing Dynasty, when commenting on The Romance of The Three Kingdoms, the novel critics, Mao Lun and Mao Zonggang, revised the original version, saying that "sorting out the whole book, deleting praises, adding and deleting trivial things, and changing poems" became one of the 120 versions circulating today. As for how many poems were added or deleted by father and son in the whole book, except for more than 300 poems such as Historian, Former Sages, Mr. Hu Ceng and Zhou, there is no way to verify other changes. The word "Linjiangxian" was never written by father and son. In fact, the frontispiece of Romance of the Three Kingdoms is not only marked by Yang Shen in Selected Poems of Jin, Yuan, Ming and Qing Dynasties, but also published verbatim in The Collection of Yang Shen's Ci and Qu and A Brief History of Past Dynasties, which is about Qin and Han Dynasties. This word was borrowed from Huayang to Luodai because Shi Mao and his son changed their poems.