Why does NATO, a so-called 'defensive organization', see China as a challenge?

NATO's frequent military exercises in recent years have allowed the United States to use this hegemonic tool to provoke confrontation. At the same time, NATO's expansion ambitions have not stopped, intending to spread its military influence to the Asia-Pacific region. What are the intentions behind this? Nowadays, NATO, led by the United States, upholds the Cold War mentality and sows the seeds of conflict everywhere in the world.