>> the US will become dependent on them for advanced semiconductors.
The US is already dependent on them. Some debate weather Taiwan is part of China, but either way the US is very dependent on TSMC and has lost its lead in semiconductors.
China is dependent on the US for food. China was able to use Brazil for the past few years to work around Trump's trade policies (lets not get into that issue), but Brazil depleted their stores to do so, and in some cases had to import food from the US to replace the the food they exported the China.
Given that necessity is the mother of invention you can imagine that with China's economies of scale and cheap labor that they will have a competitive advantage sooner than later and the US will become dependent on them for advanced semiconductors.