At the end of the Han Dynasty, the imperial family declined, and the world rose up, including many powerful people who belonged to the original system, heroes who appeared in the local area, and there were also rogues who gathered in the mountains and forests.
Among them, Yuan Shu, who was divided into the Huainan region, listened to the idea of a group of dog-headed military divisions under his subordinates, and had an iron heart to be called emperor, self-proclaimed heavenly son, and greatly sealed the group of subjects, and the specifications were compared with the emperor. This triggered a fierce backlash from the surrounding crowds, causing Yuan Shu to be besieged by the world. This Yuan Shu had originally ruled without direction and profligate, and just when the soldiers encountered a great famine, the Huainan region under his rule became a purgatory on earth.
If it were not for Cao Cao's construction of Hefei and Zhang Liao's capture of Tianzhu Peak, the establishment of the Three Kingdoms would have been postponed for many years
At this time, two of Yuan Shu's men decided to leave Yuan Shu. These two subordinates, named Chen Lan and Lei Bo respectively, after getting rid of Boss Yuan, started a business in the Huainan region, gathered in the mountains and forests, robbed houses, and seized by force, and soon developed into an armed force of tens of thousands of people. Later, Chen and Lei set up their base camp in Qianshan, in the anqing area of present-day Anhui Province, and became the owners of one village. Yuan Shu was besieged by the people of the world, and later he was really beaten to the point of being unable to mix in Huainan, and once fled to Qianshan, wanting to seek the protection of his former subordinates, but at this time Yuan Shu had reached the point where the gods hated ghosts, and Chen Lan and Lei Bo naturally refused to take him in. In the end, Yuan Shu died of illness on the way to Hebei to join his brother Yuan Shao.
Chen Lan and Lei Bo tried their best to break up their relationship with Yuan Shu, and in order to avoid the princes' fronts, the two of them hid in the hidden mountains, escaping from reality and enjoying themselves. During their time as shrunken-headed turtles, the world changed color, first Lü Bu was destroyed by Cao Cao, Liu Bei wanted to stab Cao Cao instead, and turned to Yuan Shao in Hebei; Cao Cao also turned his spearhead to the north, grinding his fists and preparing for a century-long duel with Yuan Shao; Sun Ce in Jiangdong was assassinated, and sun Quan, who succeeded him, was busy pacifying the interior. Everyone was busy with their own affairs, and they were completely unable to take care of the Huainan region after Yuan Shu's defeat, and this gave Qianshan Chen Lan and Lei Bo the opportunity to make a comeback. They used Qianshan as a base to fish and flesh the people in Huainan, and at this time, a new force also appeared in Huainan, and the leader was named Mei Cheng. Mei Chenggang conspired with Chen Lan and Lei Bo to commit adultery, and made the Huainan area miasma and devastated.
Although Cao Cao was concentrating on fighting Yuan Shao, he did not forget to deal with the Huainan problem. Cao Cao sent an official named Liu Fu to Huainan to build a new city to serve as a future stronghold for Cao Cao to govern Huainan, which would later become the famous city of Hefei. In addition to being responsible for the construction of Hefei City, Liu Fu also took on the heavy responsibility of appeasing Chen, Lei, and Mei. Liu Fu stayed for eight years, and thanks to Liu Fu's dismal operation, the Huainan region began to recover its vitality. It wasn't until Cao Cao unified the north and prepared to move south to Jingzhou that he finally had time to deal with these three unscrupulous courtiers and thieves.
In the past eight years, Chen, Lei, and Mei had grown a lot in power, and in order to deal with them, Cao Cao had sent an expeditionary force with a lineup of generals such as Yu Ban, Zhang Liao, Zang Ba, and Zhang Guo, all of whom could stand on their own, that is, to annihilate the Huainan Sanxu in one fell swoop. At the beginning, Mei Cheng first made a trick to slow down the army, and then took the opportunity to escape into the Qianshan Mountains and merge with Chen Lan and Lei Bo. The three concentrated their forces on the main peak of Qianshan Mountain, Tianzhu Mountain, intending to confront Cao Ying's generals for a long time. The precipitous terrain of Tianzhu Mountain was the "Nanyue" of the Five Mountains of the World at that time, and its status as Nanyue was not replaced by Hengshan Mountain in present-day Hunan Province until the Sui Dynasty.
The generals of the Cao camp saw that tianzhu mountain was easy to defend and difficult to attack, and they might not be able to get any advantage if they tried to attack it, and originally they planned to collect the troops and make plans again, but they knew that Zhang Liaoyi was bold and led a troop to attack directly on the mountain. Zhang Liao was worthy of being the head of The Five Sons of Cao Wei, and Tianzhu Mountain was taken down by him so hard. Chen Lan and Mei Cheng both became the ghosts of Zhang Liao's sword in this battle, and Lei Bo, who escaped from the day of his birth, wandered around with the rest of the people, and his whereabouts have been unknown ever since.
It was not until after the Battle of Chibi that an armed force appeared in Huainan, and the leader was named Lei Xu. Lei Xu then led tens of thousands of people to defect to Liu Bei; in the same year, Lei Xu was killed by Cao Cao's general Xiahou Yuan, and since then the Huainan region has entered a new stage, and the situation in the three worlds has gradually taken shape.