The Beijing Subway will be getting longer with the opening of 3 new sections at the end of December 2012. David Feng wrote a good summary of the new lines over at City Weekend.
The good news is that Line 8 is reopening with a longer northern extension towards Huilongguan, interchanging with Line 13 at Huoying. Line 15 is also extended, and there’s a brand new Line 9 which connects the Fangshan Line to Beijing West Railway Station. Line 9 and the Fangshan Line are still isolated from the rest of the subway system: you’ll need to take a bus from Beijing West Railway Station to Military Museum station on Line 1.
Here’s a map highlighted the newly opened lines: click to expand. Look out for updated versions of our interactive subway map and Beijing Subway iPhone app when the new lines open.