Well, this is one of the stranger stories I’ve seen. (scratching head)
The Persians and Chinese traded, the Greeks and the Chinese traded, the Alexandrian successor states and Chinese traded, the Romans and Chinese traded...
Still not sure that this is going to turn out to be anything. It’s interesting that cuneiform was found in China, but it doesn’t appear to be a complete text, and my wild guess is (totally uneducated wild guess) that these will hold up as cuneiform, but won’t hold up as being from the Cyrus Cylinder.