Pieces of decoction that are often used together in the same prescription, such as "Xu Xiang" and "Shixiang", and "drug pair" drugs commonly used in the prescription can be used together in one barrel. Such as ephedra and cassia twig; Semen Ziziphi Spinosae and Radix Polygalae; Rhizoma Belamcandae and Rhizoma Menispermi; Codonopsis pilosula and Astragalus membranaceus; Peach kernel and safflower; Eucommia ulmoides Oliv And dipsacus root; Pericarpium Citri Reticulatae and Pericarpium Citri Reticulatae Viride; Alisma orientalis and Polyporus umbellatus; Chinese yam and coix seed; Radix Isatidis and Folium Isatidis; Flos Magnoliae, Fructus Xanthii; Hemp, Prunus humilis; Notopterygium and angelica pubescens; Atractylodes lancea and Atractylodes macrocephala; Ophiopogon japonicus and asparagus; Sichuan aconite root and kusnezoff monkshood root; Anemarrhena rhizome and Fritillaria thunbergii; Dandelion and Viola yedoensis; Creep and point pulse; Rhizoma Sparganii and Rhizoma Curcumae; Frankincense and myrrh; Fennel, orange pit. Therefore, the question should be a.