In the deepest corners of the universe lies a celestial body with gravity so powerful that even light cannot escape—the black hole. Its core secret lies in the distortion of spacetime by its extreme mass: the immense mass causes a "concavity" in the surrounding spacetime, forming the so-called event horizon, where any matter or information that crosses this boundary will be forever obliterated. Simultaneously, its powerful gravitational field acts like a lens, bending light from background celestial bodies, producing the fantastical astronomical phenomenon known as "gravitational lensing." The most intuitive way to understand this physical reality that transcends everyday experience is to immerse yourself in this distorted spacetime. Our interactive "Black Hole" exhibit brings this cosmic spectacle to life within a 1.35-cubic-meter immersive projection space. You can first select different types of black holes with varying masses at the control panel, and then "throw" virtual stellar