Stir-fry in an iron pan. According to the inquiry of Cooking Network, when the leaves of Platycladus orientalis are fried with vinegar, the clean leaves of Platycladus orientalis are put into a domestic iron pot, and they are fried with strong fire while spreading vinegar until they are black or dark brown, so the leaves of Platycladus orientalis are fried with vinegar in the iron pot. Chinese medicine Platycladus orientalis leaves are dry branches and leaves of Platycladus orientalis, which have the effects of resolving phlegm and relieving cough, and growing hair and blackening hair.