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Dulan is home to more than 2,000 tombs dating back to the Tang Dynasty (618-907), where silk, gold, silver, bronzeware and other items have been unearthed since 1982.

During a media briefing Friday night, Tallahassee Police Chief Michael DeLeo said four people are in critical condition following the shooting, which took place in a small Tallahassee shopping center.

Due to ideological divergences, China has long been shut out of the International Space Station, which is led by the United States and operated by a 15-nation partnership. This has forced China to develop its own space station.

Due to human destruction and natural weathering, some parts of the Great Wall are damaged or have collapsed, and they are in urgent need of renovation.

Dowson Tong, senior executive vice-president of Chinese technology giant Tencent, said people are "most innovative when facing tough challenges".