The founding monarch of the Cao State was Prince Zhenduo, the sixth son of King Wen of Zhou, and the country was located in the southwestern region of Shandong centered on Dingtao, Shandong, sandwiched between Song and Lu. The ancients described the geographical location of the Cao State as "bringing the river to the river and controlling the Lu and Song dynasties", so the feudal Cao State of the Zhou royal family obviously contained the intention of preventing the eastward expansion of the Song State.

During the Western Zhou Dynasty, due to the pacifist principles pursued by the Song State, the people of Cao State have always lived a leisurely and comfortable life. In the early Spring and Autumn Period, due to the extravagance of the monarchs and ministers of the Cao State, the Cao State began to decline gradually. Later, there was an incident in which Cao Gonggong teased Jin Wengong, and as a result, Cao paid a heavy price - large tracts of land were divided by Jin and given to neighboring countries such as Lu, Wei, and Song.

From then on, the state of Cao was in a state of collapse and gradually came under the control of the Song state: the Song people demanded that the state of Cao share the tribute paid to the state of Jin, and forced the state to provide labor to build a city for themselves. The Cao people also tried to resist, but to no avail; The Cao people also complained to the Jin State, but in order to win over and appease the Song people, the Jin people acquiesced in the "power and interests" that the Song State enjoyed over the Cao State.

Although the area of Cao is small, due to its geographical location, the economy is very developed, and the people live a prosperous life. The capital city of Taoqiu (now Dingtao) was the center of merchants from all over the East, and Cao earned a lot of wealth by virtue of its geographical advantages; People all over the world called Taoqiu "Little Xinzheng" at that time.

After the Jin State lost its hegemony, the political pattern of the Central Plains underwent drastic changes. The Song state broke free from the control of the Jin state and began to exploit the state of Cao even more aggressively, and most of the profits earned by the state of Cao from international trade were extorted by the state of Song.

In the twenty-seventh year of Lu Zhaogong (BC515), in order to relieve the financial pressure, Cao Miangong went to the Song Kingdom to meet Song Jinggong. Cao Mourning's temper was not very good, and Song Jinggong was very arrogant, so the two did not speculate, and Cao Mourning Gong flipped the table on the spot. Song Jinggong was furious and imprisoned Cao Miangong; Cao Miangong was in a hurry, and died violently within a few days.

Cao was furious and sent envoys everywhere to ask for troops to prepare to attack the Song state. The people of the Song State felt that something was wrong, and hurriedly sent the coffin of Cao Mourning Gong back to Cao State, and reduced the oppression of Cao State. Cao Ren established Cao Mourning's brother as the king, and it was for Cao Shenggong.

Cao Shenggong reigned for five years and was eventually killed by his uncle Gongzitong; Gongzi Tong established himself as the king, and he was for Cao Yingong. Four years later, history repeats itself, and Cao Yingong was killed by Cao Shenggong's brother Gongzi Lu, who was Cao Jinggong.

Cao Jinggong died in the fourth year of his reign, and Taiziyang ascended the throne (the eighth year of Lu Dinggong), and he was Cao Boyang, the last monarch of Cao State.

When Cao Miangong was alive, the doctor Meng Hui had a demon dream. He dreamed that several gentlemen of the Cao Kingdom gathered in the Taimiao Temple to plot how to destroy the country he once ruled.

Uncle Cao Zhenduo was also mixed among the gentlemen, and he looked sad and depressed; He folded his hands and pleaded with everyone in a low voice: "Although Cao Guo has exhausted his qi, even if he wants to destroy Cao, he must wait until Gongsun Qiang appears, right?" All the gentlemen nodded their heads and said "yes," and then they went their separate ways.

After Meng Hui woke up, he immediately began to look around for the seed of the dead country called "Gongsun Qiang", and prepared to kill the target. But he searched for a month and didn't find any news of this person, so he was temporarily relieved.

Before Meng Hui died, he warned his son Meng Wu: "Once a man named Gongsun Qiang appears, if you can't kill him, you must immediately leave Cao Kingdom with your family property and go to a safe country!" That guy was sent by Heaven to destroy the Cao Kingdom! Then he shouted, "Oh my God, my God! What kind of great crime did my 600-year-old country commit that made Uncle Cao also help God destroy Cao! ”

Cao Boyang was in the prime of his reign when he ascended the throne, and he had lofty (or perhaps utopian) ideals of governing the country and a firm will to act, exuding infinite vitality and inexhaustible energy.

Cao Boyang had two powerful ministers under him - Sun Xiong, the Grand Sima Gong, and Meng Wu, the Great Sicheng. Among them, Sun Xiong was Cao Jinggong's sworn friend, and without Gongsun Xiong's support, he could not seize the throne, so he promoted Gongsun Xiong to the high position of Da Sima.

With the full support of the two important ministers, Cao Boyang abolished a number of evil laws and punished many evil officials; Many seemingly innocent sinners have been forgiven; In addition, it began to reform the military system and vigorously develop its military strength.

It can be said that Cao Boyang created a new political situation at the beginning of his administration, and the officials in the public office were honest and honest, and the people lived in peace. Cao's people were happy and happy, thinking that they were looking forward to the coming of the Ming Monarch and embraced the new monarch from the bottom of their hearts. The Chinese people even praised Cao Boyang with "Uncle Cao's reincarnation", hoping that he could lead the people to great rejuvenation.

However, such a seemingly wise and martial monarch gradually became stupid and degenerate; He turned all his friends into enemies, and played a good hand to the ground; And most of the subjects who had been blindly trusting him from the very beginning always followed him and waved their flags and shouted, until the end did not recognize the reality; As a result, with the unremitting efforts of the monarch and ministers, the ancient and noble country surnamed Ji was finally tossed and collapsed.

One winter, when Cao Boyang was hunting in the suburbs, a hunter who called himself "Gongsun Qiang" came to meet him and offered him two rare white geese. Cao Boyang was overjoyed and stopped to communicate with him, while Gongsun Qiang spoke to him in a thick Hexi accent. After a few words, Cao Boyang found that the old man in front of him, who looked like a human head and a pig's brain, turned out to be a talented person with brains and ambitions, so he simply terminated the field hunting operation and returned to Taoqiu with Gongsun Qiang in advance.

Gongsun Qiang's character is Pingzhong, who was originally a doctor of the Qin State, and was about fifty years old at the time. As a young man, he was determined to "set Rong Di in the west and Jin in the east", and relied on his excellent eloquence to stir up the fanaticism of many Qin people for victory, honor, and land.

At that time, Gongsun Qiang was the most famous figure in the Qin State: Qin Aigong favored him, the doctors scolded him, and the people praised him. The reckless Gongsun Qiang led his army to attack everywhere, and as a result, his crazy actions brought a series of unwarranted disasters to the Qin State. All kinds of failures made the country angry and resentful, and Qin Aigong was finally awakened by the ruthless reality and took back his military power.

Seeing that the situation was not good, Gongsun Qiang fled to the Jin Kingdom in a hurry. He was proficient in military affairs and familiar with the combat concepts of the Qin army, so he was sent by Zhao Ying to Shangluo to guard Wuguan. When Qin Aigong learned the news, he sent someone to meet him secretly, saying: "As long as Gongsun dedicates Wuguan to Qin, the widow will not only pardon your crimes, but also make you a secretary." ”

Gongsun was overjoyed, but when he was preparing to launch a rebellion, he leaked the news, and as a result, he was defeated and fled to the state of Chu. Gongsun Qiang was a very inquisitive and hardworking man, and he developed a strong interest in the politics and culture of the Chu State, where he began to diligently investigate and study the political, military, and social encyclopedias of the Chu State. During the years he lived in the Chu State, Gongsun Qiang visited many well-known people and visited almost every city in the ancient Chu land.