Sixteen centuries ago, the last chieftain of the Xiongnu sought to unite China by force. The warlord Helian Bobo orders an impregnable city to be built, becoming the capital of an empire that will finally unite China. Tongwancheng (unite all nations), or Tongwan City, would be built with thick outer walls made white with clay and powdered rice, giving the city the appearance of a giant ship. Helian will stop at nothing to build his city and his empire, drafting 100,000 Xiongnu to build his citadel. Tongwancheng might become Helian Bobo's legacy, but will it be enough to unite China under one ruler?
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