The issue that is hit immediately is we don't have a definition or test of understanding that AI doesn't clear easily. Then on top of that we can't even really be sure that we ourselves are understand things given all the tricks that our minds play with memory and perception. There is precious little evidence that the people around us understand things, they seem to be guessing. It is completely unclear if a Chinese room has or doesn't have a property if we rule out all the tests that check for it as not really counting. But all the tests we can do suggest it does understand, because engineers can implement Chinese rooms now and they even turn out to be more reliably artistic/capable of novel thinking/creative than humans. Anything that tests understanding they can do.