When talking about the Three Kingdoms, Cao said, "Go out of the Summer Gate, although the tortoise lives long." This is a metaphor. Ambitious people are still ambitious, despite their age.
The original poem is:
Although the tortoise has a long life, it still has its time. The snake rides the fog and eventually turns to dust.
The old horse lurks, aiming at a thousand miles. The martyrs were full of courage in their later years.
Translated as:
Although turtles can live for a long time, they sometimes die. Although Teng snake can break through clouds and fog, it will eventually die and turn to dust. Although the old swift horse is squatting by the manger, its ambition is still galloping for thousands of miles. Even in his later years, people who aim high will not stop trying to make progress.
Appreciation of Old Horse:
Although Returning to Life is a philosophical poem by the richest man. What Cao Cao wrote in his later years shows the poet's attitude towards life. The philosophy in the poem comes from the poet's real experience of life, so it is vivid and has sincere and strong emotional power; Philosophy and poetry are expressed by visualization, so the perfect combination of reason, ambition and emotion is realized in the concrete artistic image.
The poem "Old horse crouching tiger" is a famous sentence that has been passed down through the ages. Their brushwork is vigorous and the rhythm is heavy, which contains a heroic spirit of self-improvement and profoundly expresses Cao Cao's vigorous and enterprising spirit.