Southern China has no central heating either. Old Chinese farm houses in the north still have coal, I stayed at an urban house in Tianjin in 1999 that still use

Southern China has no central heating either. Old Chinese farm houses in the north still have coal, I stayed at an urban house in Tianjin in 1999 that still used coal honeycombs for heating. The kotatsu was invented in Japan to provide a space to heat individuals, so it’s kind of like that. You’ll still find it in use today.