This article, published in the journal Blood Science, elucidates groundbreaking advancements in understanding the endothelial origins of the hematopoietic system. As a leading platform in clinical and experimental hematology, Blood Science continues to publish high-impact research that transforms molecular biology and physiology. Authored by Professor Yu Lan from the Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University and Professor Bing Liu from the Fifth Medical Center, Chinese PLA General Hospital, this study delves into the complex cellular evolution of hemogenic endothelial cells (HECs), the molecular mechanisms driving endothelial-to-hematopoietic transition (EHT), and the striking parallels between human and mouse systems. These insights mark a significant leap toward regenerative medicine and innovative treatments for hematological disorders.