Diana is imported to the USA (solely) by Umarex - sadly that business connection continues under the mantle of GSG ownership.
Possibly this 'situation' only applies in the US (ie: by Umarex); has anyone checked European Diana sources ?
BTW - the very brief use of Chinese barrels by Diana / M&G was only on a couple of models and there were NO (REPEAT THAT) NO reports of loss of accuracy etc with those barrels, in fact they were only noticed by the change in the number of Lands & Grooves). That business practice (outsourcing) ended after a few months and really only affected the Mod 34 range anyway.