In order to scientifically and reasonably apply laboratory testing items in the diagnosis and treatment of hemorrhagic disorders, the Laboratory Branch of Chinese Medical Association, the Clinical Laboratory Center of the Ministry of Health and the Editorial Committee of Chinese Journal of Laboratory Medicine jointly decided to formulate the application suggestions of laboratory testing items in the diagnosis and treatment of hemorrhagic disorders, and entrusted the writing group of the Laboratory Branch of Chinese Medical Association to draft and formulate the application suggestions of laboratory testing items in clinical diseases. During the formulation of this application proposal, the opinions of relevant clinical experts and laboratory medicine workers were widely sought through various methods, which served as an important reference for the modification.