Looking for the most updated map of Beijing's expanding subway system? We've quickly thrown together a list of excellent references for your edification. To date, ExploreBJ is our favorite and even has an iPhone app.

1. http://www.explorebj.com/subway/
2. http://en.wikipedia.org/wiki/Beijing_Subway
3. http://www.urbanrail.net/as/beij/beijing.htm
4. http://www.johomaps.com/as/china/beijing/beijingmetro.html

Beijing's public transportation system is not what it used to be. The crowds are still present but the facilities are substantially better.