Han Haozi Yuansi (元嗣), a native of Hanoi Commandery (hanoi in present-day southwestern Wuzhi, Henan), was a general under Cao Cao at the end of the Eastern Han Dynasty. At the end of the Eastern Han Dynasty, the world was in chaos, and there were many mountains around the township and county where Han Hao lived, so there were many thieves, so Han Hao gathered the masses to defend the township and county. Later Hanoi Taishou Wang Kuang recruited him to do so. The Kwantung Qunxiong sent an army against Dong Zhuo, and Han Hao and Wang Kuang led troops to Mengjin to defend against Dong Zhuo. At that time, Han Hao's uncle Du Yang was the Commander of Heyin County, and was captured by Dong Zhuo, who threatened Han Hao to surrender, but Han Hao did not comply. Yuan Shu heard that Han Hao was a heroic man and appointed him a knight lieutenant. Cao Cao's general Xiahou Huan heard his name, and when he met him, he was so surprised that he asked Han Hao to follow him as his general.
In the first year of Xingping (194), Lü Bu secretly attacked Yanzhou, and Xiahou Huan engaged Lü Bu. Lü Bu sent people to Xiahou Huan's camp to surrender and take advantage of the opportunity to kidnap Xiahou Huan. The commander was robbed and there was chaos in the army. At that time, Han Hao was guarding the camp gate, gathering all the generals together and asking them to calm down their soldiers and not act hastily, and Xiahou Huan's army slowly stabilized. Han Hao went to Xiahou Huan's residence and angrily rebuked the people who had kidnapped Xiahou Huan, saying, "You fierce rebels, you dare to take the great general hostage, don't you want to live?" And I have a mission to fight against traitors, will I let you do whatever you want because of a great general? Crying again, he said to Xiahou Huan, "The law of the land is like this, I have to do this!" "Immediately summon soldiers to attack the hijackers. The hijacker prostrated his head in fear and said, "We only ask for the cost of the journey, let us go back!" Han Hao denounced the actions of the hijackers and killed them all. Xiahou Huan was spared death. When Cao Cao heard about this, he said to Han Hao, "Your approach can be used as the law of all worlds." "Therefore, an order was issued that in the future, if any hostages were taken, they would be eliminated together, and the hostages should not be taken care of, and the hostage-taking would never happen again.
Han Hao was one of the initiators of the Tuntian system and made great contributions to the accumulation of strength for Cao Cao's forces. In the first year of Jian'an (196), Cao Cao took the advice of Zao Qi and Han Hao and conducted a tun tian near Xu Du (許都, in modern Xuchang, Henan). The land of Tuntian is unclaimed and barren land. Labor, cattle, and agricultural tools were captured during the suppression of the Yellow Turban Rebellion, and some of the labor force, called recruitment, was actually forced to come. At that time, Tuntian harvested one million grains, alleviating social contradictions. Therefore, all the states and counties set up field officials and stored grain, and the army fought everywhere, without the labor of transporting grain, and was able to annex the thieves and pacify the world. Cao Cao was promoted to the rank of protector for Han Hao's credit.
In the fifth year of Jian'an (200), after the Battle of Guandu, Yuan Shao's forces were gradually destroyed by Cao Cao. At that time, Cao Cao pursued yuan shang and Yuan Xi to Liucheng, and the leader Shi Zhuo thought that going deep into the long way was not a foolproof plan, and wanted to work with Han Hao to hinder Cao Cao, but was dissuaded by Han Hao. In the end, according to Cao Cao's plan, indeed the siege of Liucheng, Han Hao was reappointed as the central protector, setting up Changshi and Sima and jointly responsible for controlling the forbidden army with Shi Zhuo.
In the twentieth year of Jian'an (215), Han Hao followed Cao Cao in attacking Zhang Lu in Hanzhong, and Zhang Lu surrendered. Everyone believed that Han Hao's wisdom was enough to defend the frontier, and he could leave the town to defend Hanzhong and command the armies. Cao Cao was reluctant and said, "How can I not have an escort (Han Hao)." So Cao Cao took him back to the capital. After Han Hao's death, Cao Cao felt pity. Han Hao was childless and succeeded to the throne by his adopted son Han Rong.