Our work with Nexus Photonics and Caltech is published today in Nature. Based on the new wafer-level heterogeneous integration process, we break through the limitations of the traditional silicon light in the working band, and extend the fully integrated silicon light spectrum to the whole visible light, thus unlocking a series of applications in biomedicine, atomic physics, AR/VR and so on. In this paper, we present two demo lasers based on this technology: a module that can be used as a light source for an on-chip atomic clock, and a laser in a data center that does not require refrigeration.