I've had 12 miners stuck in China UPS for past week as well, after a number of emails to and fro between myself and UPS and myself and Bitmain .. the latest response from Bitmain is:
Thanks for your consultation!
Chinese customs is very strict with Antminers these days. We are preparing the new documents they required recently. We will do our best to make the packages be released as soon as we can. Sorry again for this situation.
Please let us know if you have additional questions or concerns.
looks like a whole shipment from last batch release has been held up.
That's unfortunate, I had some issues with my package and UPS but it still arrived within the window of shipping dates for the batch. I got mine in the last few days of the August 28th - Sept 11th batch, is yours still within the shipping date range of the batch?