看到一篇报导说到，
去年中国已经超越俄罗斯成为第二大太空强权。
拥有的军事卫星数量也可能已经比美国多
https://breakingdefense.com/2023/01/china-tops-us-in-defense-related-satellites-orbited-in-2022-report/
China tops US in defense-related satellites orbited in 2022
The US attempted 78 launches in 2022, with 72 of them successful, according
to the report published Tuesday. Russia successfully launched 21. China
attempted to launch 64, and 62 made orbit. For each country, many of those
launches carried multiple satellites. For specifically defense-related
satellites, the report finds that China orbited 45, the US 30 and Russia 15.
其中有一段特别提到中国去年发射的实践21号卫星，
是第一次主动清除地球同步轨道上的太空垃圾成功。
China also became the first country to successfully move a dead satellite out
of the way of active satellites in January 2022, the report said, when it
used its Shi Jian 21 (SJ-21) spacecraft to capture a failed BeiDou 2-G2
navigation satellite from geosynchronous orbit (GEO) and drag it to a higher
“graveyard orbit.”
“This is the first case of actual active debris removal from GEO. It was
expected that SJ-21 might repeat the exercise with another satellite。
有些报导认为这个技术可以转做军事用途。
https://technews.tw/2022/01/28/china-sj21-satellite-captured-old-beidou-positioning-satellite-and-throw-it-to-the-graveyard-orbit-which-caused-worries-among-us-space-force/
https://tinyurl.com/neur2pm2
想请问一下版友，比起用飞弹直接把卫星打下来，
这样的技术有什么优点吗？为什么会会引起警戒呢？