By Charles Riley @CRrileyCNN January 29, 2015: 5:06 PM ET
Beijing to Shanghai in 5 hours
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The extensive network connects just about every major city in eastern China -- from Harbin in the north to Shenzhen, near the border with Hong Kong.
Trains cover the 820 miles between China's two largest cities -- Shanghai to Beijing -- in just five hours. Since the line opened in 2011, more than 220 million passengers have traveled the route.