Two European mercenaries traveling to ancient China in search of gunpowder encounter a secret army defending the Great Wall. They soon find themselves caught in a massive war against the "Tao Tei," a species of predatory alien creatures that attack every 60 years.

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An elite force makes a valiant stand for humanity on the world’s most iconic structure, defending the Great Wall of China against a horde of monstrous creatures. Director: Zhang Yimou.

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