Briefly describe the process of "Cao Cao's Yangtze River Banquet Poems" with about 100 words.

Cao Cao put down the separatist forces in the north and took control of the Han regime. This year, he led 830,000 troops to the north bank of the Yangtze River, prepared to cross the river, wiped out Sun Quan and Liu Bei in the south of the Yangtze River, and then unified the whole country.

On 1 1 month 15 this winter, the weather was fine and calm. Cao Cao visited the Yangtze River in a big ship and ordered people to buy wine and have fun on the ship to meet the generals. It's getting late, and the moon on Dongshan is as bright as day. . Cao Cao was sitting on a big ship, surrounded by hundreds of waiters, all wearing embroidered coats, and Hego held a halberd. Civil and military officials sit in turn. Cao Cao saw the picturesque Nanping Mountain, looking at the boundary of firewood and mulberry in the east, the river at the mouth of Xiakou in the west, Fanshan Mountain in the south and Wulin in the north. He looked around and was very happy, so he was ordered to drink. In the middle of the night, Cao Cao was drunk, so he stood at the bow of the boat, poured wine on the river, drank three glasses of wine, and said to his generals, "I am a gentleman. I broke the yellow turban insurrectionary, captured Lu Bu, destroyed Yuan Shu, collected Yuan Shao, and went deep into Saibei to Liaodong. Today, I am very generous with this scene. I think of it as a song, and you wait for peace. " That is, singing "short songs"