Dutch King Willem-Alexander (R) and Professor Leo Kouwenhoven attend the opening ceremony of 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)