: hello.

The goal of early farmers was: "thirty acres of land, one cow, and his wife and children are hot."

Kang, near the stove, is called kang head. The place far from the stove and near the chimney is called the kang. The flue on the kang is exquisite. It is necessary to burn kang and warm kang. So the flue on the kang is like a maze. Generally speaking, it is warm inside the kang. Earlier, farmers had no conditions to wash their feet every day, let alone soak their feet. When people get old, cold comes from their feet, so it is also for the purpose of health preservation to warm their feet with a hot kang. People need a clear head and are not afraid of cold, so they sleep on the kang, with their heads facing outwards and their feet facing inwards. This is based on science.