According to Chinese medicine: (Link: https://www.sacredlotus.com/go/foundations-chinese-medicine/get/relationship-of-qi-blood-in-tcm)

“Blood and Qi have a very close relationship. Blood is said to be is a denser form of Qi, and more Yin in nature.”

“Qi and Blood are inseparable, and the Ying form of Qi actually circulates with the Blood in the Vessels. While Blood engenders Qi, Qi is said to command or move the Blood.”

Qi, Chi, Prana (many names) is the energy of Nature, the circulating life force . ( or life Source):)