For more:
https://news.cgtn.com/news/2022-09-21/Yi-Zhang-Da-To-create-with-a-sheet-of-metal-1dvgBD4Xkg8/index.html

Silverware served as a symbol of affluence and artistic taste in ancient China. Yi Zhang Da is a unique method of processing metal that allows one to "create with a sheet of metal". Before the teapot is completed, Tui Huo (reducing heat) could be performed around 120 times until the sheet gradually turns into the envisioned shape.

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