What process was used to make the shang dynasty ritual wine vessel (3.3.10) ?

A Piece mold casting

Explanation:

The era of the Shang and the Zhou dynasties is generally known as the Bronze Age of China, because bronze, an alloy of copper and tin, used to fashion weapons, parts of chariots, and ritual vessels, played an important role in the material culture of the time.

In Piece mold casting, a model is made of the object to be cast, and a clay mold taken of the model. The mold is then cut in sections to release the model, and the sections are reassembled after firing to form the mold for casting.