The items included a large amount of gold, silver and bronze coins and jewellery as well as iron weapons such as swords, knifes and spears, said Gao Dalun, director of Sichuan Provincial Cultural Relics and Archaeology Research Institute.
The characters carved in the gold and silver utensils are still clear and the embossed patterns on the jewellery show exquisite craftsmanship, state-run news agency Xinhua quoted archaeologists as saying.
The treasure site, located in the intersection of Minjiang River and its branch Jinjiang River, is 50 kms away south of Chengdu, the capital of Sichuan Province.
"The objects have helped identify the area where the battle was fought and are direct evidence of this historical event," said Wang Wei, a Chinese archaeologist.
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Sichuan launched the exploration project in January when the dry season arrived. Several water pumps were used to drain water away day and night.
Hundreds of meters of the river bed appeared after archaeologists dug five meters down, where they found the relics.
Archaeologists said the excavation will last until April and the team expects to unearth more items.
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