Originally Posted by
RCyyz
I ordered a SIM from China Unicom and had it delivered (for free!

) to the hotel in Beijing. I think they only deliver within China, but you can try and see if they'll ship to somewhere in DPRK if that fits your sked better.
2GB data-only is $35 USD.
https://www.mychinaunicom.com/index.jsp
Your plan will last 90d. If you add a voice package, then you'll have the ability to extend your plan by an additional 365d which is useful if you have any plans to return to China.
Delivery appears free but at this price it is already included in what you paid.