Carbon fiber (with a carbon content exceeding 90%) is a novel fibrous material characterized by a combination of ultra-high strength and exceptionally high modulus. Its core value lies in its groundbreaking lightweight properties and outstanding comprehensive performance: with a density merely one-quarter that of steel, it drastically reduces structural weight; its tensile strength is 7 to 9 times that of steel, significantly enhancing load-bearing capacity; furthermore, its high rigidity ensures excellent dimensional stability, while its corrosion resistance and fatigue resistance are exceptional. These attributes position carbon fiber as a pivotal material for achieving weight reduction and efficiency gains—thereby pushing the boundaries of performance—earning it the moniker "Black Gold" and its widespread recognition as the "Crown Jewel" of the modern advanced materials sector.