Casserole decoction method Add water: operate according to the formula Q=KW+R+VT, where Q is the amount of water added (ml); K is the amount of absorption = 2.0 ml/g; W is the total amount of tablets (g); R is the expected amount of medicine obtained (ml); V is the evaporation coefficient = 13.1 (ml/min); T is the decoction time (min); the ratio of water added for the first and second decoction is 7:3. Soaking time: 50 minutes. Decoction: Heat to boiling on a military fire, and then cook for 30 minutes on a civilian fire, stirring twice during the decoction. Add water for the second decoction, 20 minutes, pour out the liquid after the decoction, combine the two decoctions and take orally in two doses (preferably one hour after meals)