In the normal temperature world, objects are grounded by gravity. Superconducting technology, however, presents a fascinating drama of "anti-gravity." Its core secret lies in the Meissner effect: materials in a superconducting state completely expel their internal magnetic field, generating a powerful repulsive force against external magnetic fields. Imagine a powerful magnet trying to approach a superconductor; it seems to encounter an invisible, indestructible "magnetic wall," and is steadily held aloft. Placing such a superconductor at the bottom of a train, with an array of permanent magnets laid on the track, allows the train to achieve self-stable levitation through this continuous repulsive force. This is not magic, but a song of ice and fire played by quantum mechanics in the macroscopic world—a technological epic composed by extreme low temperatures (superconductivity) and controllable magnetic fields (levitation). Our "Superconducting Levitation Train" exhibit is like a mini
