In 2025, satellite quantum communication, leveraging its "unconditionally secure" technological advantages, has emerged as one of the top 10 new tracks in commercial space, becoming a core breakthrough for the global upgrade of communication security. As an important application branch of quantum informatics, this technology is based on quantum mechanics and fundamentally addresses the security risks of traditional communication through core technologies such as Quantum Key Distribution (QKD). In 2016, China successfully launched the "Micius" quantum satellite, the world's first quantum science experiment satellite, which took the lead in achieving 1,200-kilometer satellite-ground key distribution and completing an intercontinental quantum communication experiment spanning 7,600 kilometers. In 2025, "Micius-3" further realized quantum key distribution between Hefei, China and Geneva, Switzerland, with a key generation rate of kilobits per second over a distance exceeding 12,000 kilometers. Additionally, "Jinan-1", the world's first quantum micro-nano satellite, has promoted the low-cost development of satellite-ground quantum communication through lightweight design. Currently, the rise of satellite quantum communication stems from two core needs: on the one hand, breakthroughs in quantum computing pose a fundamental threat to traditional RSA encryption algorithms, while quantum communication can recast the cornerstone of communication security; on the other hand, satellite links, leveraging the low-loss space environment, break through the distance limitations of quantum signal transmission on the ground. Globally, China, the United States, and the European Union are accelerating their layouts. China Telecom plans to invest 3 billion yuan to build a "quantum + cloud + AI" ecosystem, and enterprises such as Boeing and Thales are also advancing related satellite projects. The technology has broad commercial prospects in finance, military, satellite internet and other fields. The national "14th Five-Year Plan" has listed QKD as a key information security technology, clearly aiming for large-scale commercialization by 2030. With the improvement of technology maturity and cost reduction, satellite quantum communication will build a global quantum communication network of "ground trunk lines + satellite intercontinental distribution", ushering in a new era of communication security. For more information, you can click: https://www.tiktok.com/@mia_iot