On December 25, 2002, China's blood cell donor network system was established. On December 25, 2002, China's blood cell donor network system was officially established. At present, the database contains more than 50,000 volunteer data, of which more than 6,000 have entered the network system annually, initially forming the capacity for clinical transplantation. The network system operated is a complete data recording, transmission and retrieval management software that can manage the data of millions of volunteers. Beijing, Shanghai, Liaoning, Shandong and other 13 provinces have initially established branches, these branches are responsible for local blood stem cell donor volunteers transplantation, organization, mobilization, recruitment, registration, collection of blood samples, etc. In order to ensure the number and quality of volunteer data for disease patients, China's blood cell