Shi Huangdi of the Qin Empire ordered the construction of the Great Wall to protect China.
Shi Huangdi, the first emperor of the Qin Empire in ancient China, ordered the construction of the Great Wall to protect China. To find this answer, you can refer to historical records, textbooks, or reliable online sources that detail the reign and accomplishments of Shi Huangdi. These sources will explain how the Great Wall was built as a defensive structure to protect China's northern border from invasions.