Why is most everything made/assembled in China?

Western civilization is called marine civilization. Not because they live on the ocean but because ocean navigation is the cheapest means of transportation. In other words, Western civilization is a trade civilization. Western civilizations are all around the sea. Ancient Athene was Aegean Seapower. Ancient Rome was a Mediterranean Seapower. Great Britain and America are global seapower. Seapower gets rich through the monopoly of trade. China had always been a continental civilization with an economy based on production, not on trade. China gets rich by production, not by the monopoly of trade. Trade itself will not create wealth, according to Adam Smith and mainstream economists. Only production creates wealth. When China got into the global economy with its five thousand years of continental civilization tradition, it enabled America to get more profitable by trading more goods Made in China.

When continental civilization meets marine civilization in the global economy, both take their historical tradition and played their intrinsic roles in the division of labor in the global economy.