What should I do if the coal stove heats up and smokes?

Most coal stoves sold in the market burn honeycomb coal, and some coal stoves have chimneys with interfaces. You can buy several chimneys and install them directly outside the window. Some have no chimney connection, and the chimney can just sit at the mouth of the stove and extend out of the window. I tell you, the longer and warmer the chimney, the better the stove will burn. Be careful when pouring cigarettes.