China built its massive manufacturing industry on vast quantities of cheap labor and a massive global consumer base. However, Chinese labor costs have been rising sharply for the past decade for many reasons but one major factor is that the one child policy was very successful and lead to a drastic hollowing out of their younger workforce and consumer base. Meanwhile the older experienced generation are aging out and China is entering a demographic winter which will lead to a 50-60% decline in population by mid to late century depending on whose numbers you trust. There is a similar hollowing out of the consumer base occurring all over the world with few exceptions. So it is highly improbable that China can fill in the most complex high tech supply chains by itself quickly enough to be useful while its workforce dwindles, it’s losing markets to sell to, and while its major trading partners are actively trying to thwart its progress.