How did Jiang Banxia do it?

Take raw Pinellia ternata 10 kg, pour it into a jar, soak it in clean water 1 day, take it out and put it into a basket, drain the water, put it into a jar, marinate it in a pot with 2.5 kg of alum powder and 2.5 kg of ginger (juice) 1 night, and add clean water the next day, which is about 5 inches higher than the medicine, in spring and summer. Sun-dried until there is no hemp, exposed for 7 days, fried Fructus Aurantii Immaturus 10g, dried tangerine peel 15g, Schisandra chinensis 15g, fried Fructus Aurantii 12g, mint 12g, and Chuanxiong/kloc. Grinding Radix Aucklandiae15g, Fructus Amomi10g, Lignum Aquilariae Resinatum 3g, Cortex Cinnamomi10g, and Fructus Amomi15g into fine powder, adding into the medicine, mixing uniformly, and drying in the sun.