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Gangcong (pronounced "steel plate" in Nantong dialect) is also called "oblique angle" (pronounced "rigid stick" in Nantong dialect).
As the name implies, "jar" is the fragment of a broken water jar, and the reason why it can become the name of snacks may be because of the "diamond" shape of the jar. It is also said that the mature tool is the barrel furnace, and the finished product is divided into two pieces, so it is called the barrel piece.
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