In a glass case at Beijing's Imperial College, an 18th century book with a yellowed title page in bold, black characters is evidence -- some Chinese say -- that a swathe of modern-day Japan belongs to China.
A model of the Ryukyu students' school in the ancient Imperial College is on display at the Imperial College in Beijing on October 10, 2012. The biggest of the Ryukyu Islands, which stretch for about 1,000 kilometres (620 miles) from Japan's mainland almost to Taiwan, Okinawa was the centre of the Ryukyuan kingdom, which pledged fealty to both Chinese emperors and Japanese feudal lords.
The two Asian powers are already at loggerheads over a set of tiny uninhabited islets in the East China Sea, even stoking fears of armed conflict.
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