Prepare now. Start stocking up. Learn how to prep. Learn how to grow your own food. Get some farm animals if possible. Once we go to war with China, we have no supply chain. It will be halted for months.
This is true but people need to understand that whomever has the most powerful navy stays in power it's been true throughout history right now the United States has the most powerful navy counting aircraft carriers and nuclear submarines China and Russia are way behind and the ONLY deterrent is Nukes and mutually assured destruction but if it ever comes to an invading force....China definitely has the numbers.
P.S. consider the foreign operatives that are here in this country as we speak....including UN forces the American Citizens could easily be rounded up.