Transport in Beijing is incredible. It's cheap, runs to time and covers the entire city. It is so successful that it is always crowded... But don't let that stop you using it!
"An Englishman in Beijing" by Brian Salter (ISBN: 9781784779658) is available for sale in China at ¥85 from Taobao: https://detail.tmall.com/item.htm?id=675304960828&spm=a21dvs.23580594.0.0.3f062c1bQ6bPG5&skuId
** A Blogger's Guide to Beijing by Brian Salter, is published by Amazon ASIN: B083V1JQN5