Today, 38 years ago, on January 29, 1987 (Lunar calendar, January 1, 1987), the American Chinese scientist Zhu Yuan announced the first superconductor over 90K. On January 29, 1987, the American Chinese scientist Zhu Yuan and others announced the first superconductor over 90K, which was the first human discovery of a superconductor that broke through the liquid nitrogen temperature zone (77K), another milestone in the history of superconductor physics.