The Qin empire build a long defensive wall and canals and standardized wights and measures.
The Ming Dynasty.
the great wall
In the Ch'in dynasty was when the emperor decided to build it
The Qin Dynasty (221-206 BCE) was the first to build extensive defensive walls that eventually became part of the Great Wall of China. This monumental construction aimed to protect against invasions from nomadic tribes and to consolidate the empire's borders. The walls were later expanded and rebuilt by subsequent dynasties, including the Han and Ming, but the Qin laid the groundwork for this iconic structure.
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During the China dynasty, Chin had an army of slaves ,criminals, and farmers build the wall as a punishment.
4,500 miles
Qin Shi Huang the first emporer of China built the 'Wan Li Qang-Qeng' (10,000 li Long wall) or first great wall of China 2000 years ago. This was the Qin dynasty. Microblitz
pen15 :)
who built a defensive wall was hadrian
Qin Shi Huand Di, the first emperor of China from the Qin Dynasty.