What should I do if the smoke flue smells bad?

Generally, this kind of situation is caused by the chimney. There are several solutions, such as installing an unpowered fan at the top of the chimney to increase the pumping force, so as to prevent the smoke from entering other kitchens. If the unification cannot be reached, install a closing valve on the pipeline leading to the chimney, and turn it off when not in use. If it doesn't work, plug the pipe mouth with styrofoam, open a hole in the window and discharge it; The best way is to install an oil fume purifier to purify the oil fume indoors, which is environmentally friendly.