Recently, the 500-meter Aperture Spherical Telescope (FAST), known as China’s ‘Sky Eye’, has embarked on maintenance and upgrade work for its core components. This involves replacing six massive steel wire ropes, each weighing over 6 tons and collectively stretching nearly 4,000 meters. The project is expected to run through late June this year. The feed cabin, which is hoisted and maneuvered by these six steel wire ropes, can move flexibly above the reflector surface. These wire ropes undergo hundreds of bending and pulsed loads every day, and their fatigue life directly affects the stable operation of the telescope. Since its inauguration in 2016, FAST has relied on imported steel wire ropes, with the previous replacement taking place in 2021. To achieve localization, the FAST team conducted rigorous testing on sample ropes. In August 2025, the new domestically produced steel wire ropes successfully passed three rounds of iterative experiments, marking a significant breakthrough in the localization of FAST’s core traction components. Additionally, a comprehensive technical system has been established, providing valuable experience for other major scientific and technological infrastructure projects.