Is the mud stove round or square?

Round. From 1949 to 1954, they are all made by individual workshops, produced and sold by themselves, and the mud furnace is round. 1954 set up a cooperative group for mud furnace production, and 1956 was transformed into a cooperative for mud furnace production. Before pushing the earth and pulling the charcoal, the mud stove is a good thing. After winter, the stove in the extremely narrow room will be demolished and built next year.