Answer:
Silk
Explanation:
Silk was considered to be the most expensive item in China, silk is considered to be a symbol of culture and wealth in China.
For the first time silk was found in Ancient China, silk is made from the cocoons produced by the silkworms. Silk is produced from cocoons produced by the silkworms. The silk thread that comes out of the cocoon is thin yet strong is woven into a very soft and smooth material. Silk was kept as a secret for a thousand years in China until it was smuggled out of China in 552 AD.