Grand Canal China-- The Grand Canal was an expensive investment, but it made great profit by uniting the northern and southern economies of China. "It established an economic foundation for political and cultural unity" (Bentley and Ziegler 283).
China || The Grand Canal is a vast waterway system in the north-eastern and central-eastern plains of China, running from Beijing in the north to Zhejiang province in the south. Constructed in sections from the 5th century BC onwards, it was conceived as a unified means of communication for the Empire for the first time in the 7th century AD (Sui dynasty). This led to a series of gigantic construction sites, creating the world’s largest and most extensive civil engineering project.