Now people used in winter to warm the bed, mostly hot water bags, hand warmers and so on, also useful electric blankets. In the past, there were no such things. In Jiangsu and Zhejiang provinces, salt bottles or soup dumplings were generally used. What is soup dumplings?

Mrs. Tang, also known as "Tin Lady", "Tang woman", "Foot woman", is a flat-shaped bottle made of copper or tin. Will fill enough hot water soup into the bed, can raise the temperature of the bed, is the ancient common heating supplies, and modern hot water bag function is much the same. It existed in Song Dynasty.

The name "Tang lady" has a long history. "Tang" refers to boiling water or hot water in ancient Chinese. "Wife" refers to its function of accompanying people to sleep. A soupette is a household heating appliance, filled with hot water and placed under the bed to raise the temperature.

A soup pot is a flat round pot of copper or magnetic material with a screw opening in the top through which hot water is poured. Copper, tin, ceramic and other materials, generally pumpkin shape, small mouth, lid inside the operculum, to prevent leakage. The well-watered "soup lady" twisted her nut and stuffed it into a similar-sized cloth bag under the bed, so that she could sleep very warm at night.

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