 3D printing of a living material with high cell viability and precise cell spatial distribution control using an all-pected printable hydrogel platform based on one-step-click chemistry accelerates diabetic wound healing in rats by promoting angiogenesis, reducing tissue hypoxia, down-regulating inflammation, and facilitating extracellular matrix remodeling. This article was offered by Jinjian Huang, Rong Yang, Jiao Jiao, and others.