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Crystal glass [Photo/artron.net]

The glass looks modern though it is from the Warring States Period (475-221 BC). The glass is made of a whole piece of fine-quality natural crystal. The crystal glass, unearthed from Shiqiao village in Banshan town of Hangzhou in 1990, is the largest crystal relics unearthed in China so far, and was included as a national treasure.

Some netizens jokingly said that, "My milk cup has travelled to the Warring States Period."