Guests visit the Microsoft Quantum Lab Delft on the campus of Delft University of Technology (TU Delft), in Delft, the Netherlands, Feb. 21, 2019. Dutch King Willem-Alexander opened the Microsoft Quantum Lab Delft here on Thursday. With the lab, Microsoft strengthens quantum research in Delft, a research area where TU Delft ranks among the world's best. (Xinhua/Sylvia Lederer)