King Huanhui of Han (died 239 BC), given name Rán (然), was the ruler of the State of Han between 272 BC and until his death in 239 BC. He was the son of King Xi of Han. During his reign, Han Fei

Han Fei

Han Fei was a Chinese philosopher who, along with Li Si, Gongsun Yang, Shen Dao and Shen Buhai, developed the doctrine of the School of Law or Legalism...

 submitted numerous proposals to enact Legalism

Legalism (Chinese philosophy)

In Chinese history, Legalism was one of the main philosophic currents during the Warring States Period, although the term itself was invented in the Han Dynasty and thus does not refer to an organized 'school' of thought....

. In 246 BC, King Huanhui sent Zheng Guo

Zheng Guo

Zheng Guo or Cheng Kuo was a hydraulic engineer from the ancient Chinese kingdom of Han who designed the Zhengguo Canal in the kingdom of Qin during the Warring States Period. The canal remains to this day, despite having been constructed in the third century BC. The canal was originally designed...

 west to Qin

Qin (state)

The State of Qin was a Chinese feudal state that existed during the Spring and Autumn and Warring States Periods of Chinese history...

 to construct a canal

Canal

Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

 with the intention of wasting Qin's resources. The canal came to be known as Zhengguo Canal

Zhengguo Canal

The Zhengguo Canal, Zhengguoqu or Chengkuo Canal , named after its designer, Zheng Guo, is a large canal located in Shaanxi province, China. The canal irrigates the Guanzhong plain, north of Xi'an. Together with the Dujiangyan Irrigation System and Lingqu Canal, it is one of the three biggest water...

.

In the 55th year of King Nan of Zhou

King Nan of Zhou

King Nan of Zhou, ch. 周赧王, py. zhōu năn wáng, wg, King Nan of Zhou, or less commonly King Yin of Zhou, trad. ch.: 周隱王, sim. Ch.: 周隐王, py: zhōu yĭn wáng, wg: King Yin of Zhou was the thirty-sixth and last sovereign of the Chinese Zhou Dynasty. He was King for fifty-nine years, longest in Zhou...

 (262 BC), Qin sent Bai Qi

Bai Qi

Bái Qǐ was an outstanding military leader of the State of Qin during the Warring States Period of Chinese history. Born in Mei , as commander of the Qin army for more than 30 years, Bai Qi was responsible for the deaths of a total over 890,000 enemy soldiers, earning him the nickname Ren Tu...

 to invade Han and took Yewang

Qinyang

Qinyang is a county-level city in Henan province, People's Republic of China. It is administered by the prefecture-level city Jiaozuo. The current population of Qinyang is estimated at 470,000...

. To broker peace, King Huanhui ceded Shangdang Commandery

Shangdang

The Shangdang Prefecture or commandery , was an administrative subdivision of ancient China from the time of the Spring and Autumn Period...

 to Qin. The people of Shangdang refused to be ruled by Qin but also lacked the military strength for defense. Shangdang's governor-general Feng Ting (冯亭) surrendered instead to Zhao

Zhao (state)

Zhao was a significant Chinese state during the Warring States Period, along with six others...

. Zhao accepted the surrender and sent Lian Po

Lian Po

Lian Po was a prominent military General of Zhao during the Warring States period of China. Bai Qi, Wang Jian, Li Mu and he were commonly known as the Four Greatest Generals in Warring States....

 to defend Changping

Gaoping

Gaoping is a county-level city in Shanxi Province, China with a history stretching back to the Warring States Period . Part of the city was formerly known as Changping where a noted battle took place in 260 BCE between forces from the rival States of Qin and Zhao.Gaoping is also famed as the...

; the Battle of Changping

Battle of Changping

The Battle of Changping was a military campaign that took place during the Warring States Period in China. It concluded in 260 BC with a decisive victory by the State of Qin over the State of Zhao, and ultimately allowed Qin to conquer and unify China decades later...

 ensued.

King Huanhui died in 239 BC and was succeeded by his son King Fei of Han.

Ancestors