The term means spleen qi has the function of keeping blood flowing within the blood vessels through the securing and controlling functions of qi. In terms of the relationship between qi and blood, qi is the commander of blood and generates, activates, and contains blood. Qi exerts its influence on blood via the physiological activities of the qi of the zang-fu organs. Whether qi can control and contain blood is closely related to the function of transportation and transformation of the spleen. Whether qi can promote blood circulation is closely associated with the propelling of heart qi, depuration and descent of lung qi, free flow of liver qi, and ascending and descending of qi in the spleen and the stomach. The spleen governs transportation and transformation and is the source of qi and blood production. If spleen qi functions properly, nutrients of food and drinks will be abundant and qi and blood will be sufficient. If spleen qi is deficient and weak and fails to transport and transform, the source of qi and blood will be scanty, which leads to a variety of hemorrhages.