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.
MyChinaUnicom is a lot more expensive than what you would actually get from China Unicom.