What does Du Mu's Red Cliff reflect and what is its implication?

The Red Cliff written by Du Mu, a poet in the Tang Dynasty, reflects that Battle of Red Cliffs is related to the survival of the country and the safety of society. At the same time, it implies that you are ambitious and will not be reused. Chibi is a seven-character quatrain written by Du Mu, a poet in the Tang Dynasty. The original text of this poem is as follows:

A broken iron halberd sank into the sand and disappeared, only to find that it was the remnant of Battle of Red Cliffs after grinding and washing.

If the east wind is not convenient for Zhou Yu, I'm afraid the outcome will be Cao Cao's victory and Er Qiao's detention in Tongquetai.

Explain in vernacular Chinese: a broken halberd (an ancient weapon) sank in the sand at the bottom of the water and has not been eroded. After grinding and washing, it was found that it was left over from Battle of Red Cliffs. If the east wind is not convenient for Zhou Yu, I am afraid that Cao Cao will win and Er Qiao will be put in Tongquetai.

Extended data

Creative background: This poem was written by the poet after passing through the famous ancient battlefield Chibi (now Chiji Mountain in the southwest of Wuchang County, Hubei Province) and feeling the success or failure of heroes in the Three Kingdoms period.

Battle of Red Cliffs, which took place in October of the 13th year of Jian 'an (2008) of Emperor Xian of Han Dynasty, was a major battle that played a decisive role in the historical situation of the Three Kingdoms. As a result, Sun and Liu were defeated, and Zhou Yu, the 34-year-old commander-in-chief of Sun Wu, was the most important figure in this battle. The poet watched the remains of the ancient battlefield and expressed his unique views on Battle of Red Cliffs.

"If you don't sell iron, you will recognize it if you wash it." These two sentences mean that the broken Zhan Ji sank in the sand and was not eroded. After grinding, he recognized it as a relic of the previous dynasty. Here, these two descriptions seem dull, but they are uneven. The broken halberd is buried in the sand, pointing out the historical situation here. The broken sand in Zhan Ji has not been eroded, suggesting that time has passed and things have changed.

"Dongfeng is not with Zhou Lang, and Tongque Chunsuo Er Qiao." These last two familiar words mean that if Dongfeng hadn't helped Zhou Yu, Tongquetai would have locked Er Qiao in Dongwu. This involves the famous Battle of Red Cliffs in history.

The poet described Cao Cao's arrogance after his victory and Wu Dong's humiliation after his defeat under the condition that "the east wind is not as convenient as Zhou Lang" with such a poem as "Tongque Terrace locks Er Qiao in the depths of spring", which is extremely powerful. It not only sets off the hero with beauty, but also reflects the previous sentence of Zhou Lang, showing more affection.