On the evening of August 12th, a groundbreaking study led by Professor Zhang Yuanbo from Fudan University's Department of Physics, in collaboration with esteemed partners, made its debut in the prestigious journal Nature. The team achieved a remarkable feat by meticulously reducing a copper-based high-temperature superconductor to a mere single CuO₂ plane, thereby solidifying the two-dimensional nature inherent in high-temperature superconductivity. Moreover, their exploration unearthed an intriguing 'anomalous metallic state' and quantum critical phenomena at the brink of the superconducting-insulator transition, paving the way for a novel quantum experimental platform to delve deeper into the enigmatic mechanisms underpinning high-temperature superconductivity. Superconducting materials, with their immense scientific research potential and practical applications, boast a vast array of uses that span multiple industries.