Zheng Guo or Cheng Kuo was a hydraulic engineer from the ancient Chinese

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 kingdom of Han

Han (state)

Han was a kingdom during the Warring States Period in China, located in modern-day Shanxi and Henan. Not to be confused with South Korea which shares the same character....

 who designed the 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 kingdom of 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...

 during the Warring States Period

Warring States Period

The Warring States Period , also known as the Era of Warring States, or the Warring Kingdoms period, covers the Iron Age period from about 475 BC to the reunification of China under the Qin Dynasty in 221 BC...

. The canal remains to this day, despite having been constructed in the third century BC. The canal was originally designed as a method to trick the ruler of Qin so that Qin could not expand to the east. However, when it was completed, it was a great agricultural boost to the region.