Glass feeder

There was a glazed kiln in Beijing in the Yuan Dynasty, which was called Liulichang, and similar official kilns were built in later dynasties. The raw material of glass is a kind of colored translucent mineral material, and the key to the process lies in the word "blowing", so people in Beijing call it "blowing material alive". The famous feeder in Beijing once blew a bunch of grapes, which are vivid and crystal clear, and can definitely be confused with the real.
Reprinted with attribution： https://cnlocality.com/(Chinese Specialty Products)