The background story of Tanka Xing?

There are two theories about the writing background of "Dan Ge Xing":

One was written before the Battle of Chibi and originated from the chapter novel "The Romance of the Three Kingdoms".

Cao Cao pacified the northern separatist forces and took control of the government. He also personally led an army of 830,000 people to the north bank of the Yangtze River, preparing to cross the river to eliminate Sun Quan and Liu Bei, and then unify all of China.

In the thirteenth year of Jian'an (AD 208), on November 15th in winter, the weather was fine and the sea was calm. Cao Cao ordered: "Let's put wine and music on the big ship tonight to entertain all the generals." At night, the moon in the sky is very bright, and the Yangtze River is like a plain belt floating horizontally. Look at the generals on the boat, all of them are wearing rich clothes and embroidered coats, they look so majestic. Cao Cao told the generals: "Since I raised my army, I have eliminated harm for the country, wiped out the four seas, and brought peace to the world. Now I have only the south that I have not yet obtained. I invite you to come today and work together for me to unify China. In the future, the world will be peaceful. We* **Enjoy the glory and wealth."

The civil and military officials all stood up to express their gratitude. Cao Cao was very happy. He first offered wine to the Yangtze River, and then drank three large cups. He then told the generals: "I will use this to break the Yellow Turban, capture Lu Bu, destroy Yuan Shu, capture Yuan Shao, go deep into the northern part of the Great Wall, directly to Liaodong, and conquer the world. I am living up to my ambition as a man. On this beautiful day, I will compose a song, and you will follow." and. Then, he sang: "Singing to wine, the geometry of life... three turns around the tree, there is no tree to rely on, the mountain never gets too high, the water never gets too deep, the Duke of Zhou spits out food, and the world returns to its heart."

一 This was written long after the Battle of Chibi.

From Cao Cao's "Dan Ge Xing" quoting "Lu Ming", it is inferred that this poem should have been written after Du Kui created elegant music for the Wei State, most likely in May of the 21st year of Jian'an (216) Entertain Karasuma Xingshan at Pfulu's banquet. Since the toasts are addressed to different guests, the whole poem appears to be discontinuous and incoherent.

Reference materials:

1. "Dan Ge Xing - Creation Time Background and Cao Cao's Mentality at the Time", Shen Liqun, School of Liberal Arts, Wuhan University, Journal of Hubei Normal University.

2. "The Writing Time and Others of Cao Cao's "Dan Ge Xing"", Wang Qing, Journal of Nanjing Normal University.