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Shanhaiguan, meaning "Pass Between the Mountains and the Sea," is a strategic location in northeastern China, incorporated into Qinhuangdao city. Historically, it was crucial for defending Beijing from the northeast and marked where the Great Wall of China met the coast. A pass was first built here in 583 CE, with a new one constructed in 1381 during the Ming dynasty. Although it lost its strategic importance in the 20th century, Shanhaiguan is now a popular tourist destination, known as "the first pass under heaven".1

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2 Britannica Sources
  1. Shanhaiguan
  2. Great Wall of China

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