Real powers (India doesn't quite qualify) know that land border changes is too expensive to hold down even if you can change them temporarily. Everything has shifted to soft power, wealth, political influence, and the military muscle to back those qualities rather than expensive land wars that go nowhere, can you think of a few in the 20th century?
So the USA applies information and psychological warfare on the world. Against China it's less effective, except in HK, so it wages economic and technological warfare on China instead. Military warfare between the two is not happening until one is very obviously stronger than the other and this hasn't been the case since China's mastered the ICBM+SLBM+H bomb combo back in the 1970s. China instead focuses on enriching itself because once ALL of Chinese reach the economic productivity of Americans, it will become 10 Japans in output and STEM dominance. It just needs to do that and shelter itself from the US and its cronies until it reaches this point. If it becomes successful in this endeavor, it will be as influencial and large as the entire western world combined. This is their greatest fear and this is why instead of kinetic war or even psychological and information war, the US wages trade war and tech war on China to best hinder it.
So the USA applies information and psychological warfare on the world. Against China it's less effective, except in HK, so it wages economic and technological warfare on China instead. Military warfare between the two is not happening until one is very obviously stronger than the other and this hasn't been the case since China's mastered the ICBM+SLBM+H bomb combo back in the 1970s. China instead focuses on enriching itself because once ALL of Chinese reach the economic productivity of Americans, it will become 10 Japans in output and STEM dominance. It just needs to do that and shelter itself from the US and its cronies until it reaches this point. If it becomes successful in this endeavor, it will be as influencial and large as the entire western world combined. This is their greatest fear and this is why instead of kinetic war or even psychological and information war, the US wages trade war and tech war on China to best hinder it.