Li Di, a Chinese radio astronomer and chief scientist of China's five-hundred-meter Aperture Spherical Radio Telescope (FAST), makes a speech at the 17th Marcel Grossmann Meeting in Pescara, Italy, on July 9, 2024. The five-hundred-meter Aperture Spherical Radio Telescope (FAST) located in southwest China's Guizhou Province has yielded significant scientific results and created a new avenue for astronomical collaboration between China and European countries in recent years. (Xinhua/Li Jing)