"...awakened by the sound of Chinese jackboots in the middle of the night then these two interferences are totally equivalent...."
China has a population of around 1.4 billion. That is a lot of bodies. And, they are bodies that need to eat, drink and do the same general stuff that every human does. Compared to that population, the Chinese Army runs about 2 million. The US has just under 1 million in the Army alone. And the US number does not count the Navy, Air force, and Marines. China has the the "third largest" military, and as fraction of the population, it is even smaller. China has a very long, very extensive history of "throw the rascals out" moments. Their interests are primarily at home, and that includes the home population not getting ideas. But, because of that same population, they must look outside the country to off set risks from crop losses in side their borders and the last two years for example have been catastrophic to their agriculture. The point here is that they essentially that they are pretty near the edge economically. Trying to put "Chinese jackboots" too far from home would be counter productive and not in China's best interests. They know that better than any other country on earth. The modern "Communist Party" is composed of Mandarins in the 19th century sense, with very few remaining believers. They are and have always been very pragmatic. They know markets just as well as any western capitalist. And, because of a very long recorded history, they may have a better predictive grasp of possible and likely problems (weather, crops, etc.) than we imagine. They have been buying land in Australia and parts of North Africa and curiously in North Africa, those areas are receiving more rainfall than they have in centuries.