Mugwort grows in most areas of China, such as the Yangtze River to the north and south can be divided into large-leafed and small-leafed mugwort. North of the Yangtze River for the large-leaf moxa, this moxa leaves thick and wide villi, moxa fiber coarse yield high, fragrant smell, fire soft. South of the Yangtze River for the small-leaf moxa, small and thin leaves, low yield, smoke and fire. Chu medical brand of moxa is used in the dongting lake side of the moxa made