Dried tangerine peel is a good medicine. It contains a lot of vitamin C and essential oils. It has functions of regulating qi and reducing phlegm, invigorating stomach and dehumidification, lowering blood pressure and so on. The original old house fire cooking in the wood put some dry orange peel, can play indoor fragrance, disinfection, qingzhang effect. No one uses this stuff with the new gas these days.