What exactly is stopping you from buying enough test to last a few years now? If you're on 200mg/wk that's 5 vials a YEAR.
So for $100 from QSC, or a little more from other suppliers you can get TWO YEARS worth, plenty of cushion for replacement sources to develop if supply from China, including raws comes to an abrupt halt. Or maybe if it's so important, consider blowing your life's savings and get FOUR years worth for $200.
Or just keep barely enough on hand, assume you'll always be able to get gear as easily as you can now, there will never be a problem, and even if there is 5 minutes later factories making raws outside of China will undoubtedly appear overnight. That's guaranteed, just listen to the guys here who say so. Randos on the net assuring you a long supply interruption isn't possible, would never, ever put you in a position where you might be forced off TRT unexpectedly. After all, you wouldn't want to spend a couple hundred bucks as insurance against something that'll never happen, right?