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  Construction on the Great Wall of China begins. this is significant becaise It was meant to is mark China's boundaries and protect it from invaders and it still stand today.
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  The Shang Dynasty is the first civilization in China for which there is a written record. This is significant because during the Shang Dynasty the Chinese developed a system of writing.
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  China becomes a Communist nation after a 20-year civil war. This is significant because it ends centuries of dynastic rule and the relationship with the U.S. are strained.
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  U.S. President Richard M. Nixon visits China. Tis is significant because the visit leads to a U.S.-China agreement to work together to improve relations.