If I've missed something, then the aforementioned would allow me to pinpoint it...being told "it won't work because of China" doesn't help me to highlight where I may have gone wrong, or even to allow me to provide a critical argument in return.
You can easily create back-dated models for trading that work perfectly on history but will fail after they work live so it isn't a valid test.
(anyone who does automated trading knows this)
And what about back-dated models for trading that work perfectly in BOTH environments? Because the model is actually sound.