Completed in 609 AD, what was built from Beijing to Hangzhou and is the longest of its kind in the world?

Running north to south in Eastern China, the Grand Canal stretches more than 1,100 miles, making it the world's longest manmade waterway. Connecting two major cities (Beijing and Hangzhou) and two major rivers (Yangtze and Yellow), the canal has served to ship grain to the capital and to feed hungry soldiers along the way.

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