"Comrade Li Yuan, please explain the mechanism behind women's menstruation.",If one has blood deficiency, add Ejiao, Astilbe and Alisma to nourish blood and stop bleeding; if it is caused by blood heat, add Crane Herb, Rhei Radix et Rhizoma, Cirsium Arvense and Sanguisorba Officinalis to cool blood and stop bleeding; if it is caused by cold blood, add Artemisia Argyi carbonized, Ginger and Eucommia ulmoides for warming channels and stopping bleeding.,If it weren't for the impending disaster that was too terrible to bear, Li Yuan could have lived a carefree and blissful life in this prosperous era.。