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"By far it is the earliest fossil crayfish found in the world," said Shen, who has scrutinized and researched hundreds of fossil crayfish unearthed in Liaoning province, together with his colleagues.

"Carrying gold and silk, Han Dynasty fleets set sail at Hepu port to trade with countries in Southeast and South Asia, as far as India and Sri Lanka, exchanging goods for pearls, crystals, agate and amber," said Lian Shiming, curator of the Hepu Han Dynasty Museum, adding the valuable maritime cultural heritage could benefit more than the county's popularity, and promote Hepu's tourism as well.

"China is a strategic partner," said Zambrano. "Although we are a small economy, being in a strategic location in the westernmost part of South America and aligned with the Equator allows us to develop all connectivity.

"China looks forward to a full exchange of views on our future cooperation plans," he said.

"China and the US share several common interests. Economic and trade cooperation is important for the development of both countries, and so promoting pragmatic cooperation will benefit both the Chinese and American people," said Wang Weizhong, Shenzhen Party secretary.