Si Wu Tang is the normal decoction method, soak for 15-30 minutes before decoction, three big bowls of water into a bowl of water, decoction with a military fire boil, with the fire slowly decoction for 20-30 minutes, during the period of chopsticks stirred four or five times can be. Decoct a pair of medicines twice, then combine and divide into two, take one bowl in the morning and one bowl in the evening. Take it half an hour before meals.