Bicycles in Beijing inspired the song "Nine Million Bicycles" found on Katie Melua's album called "Piece by Piece" released in 2005. The last decade saw a proliferation of cars in China but Beijing still remains one of the top cities when it comes to infrastructure for cyclists. In fact, there are bike lanes that can be found in each and every area of the city. There is no place in Beijing that cannot be reached with the help of a bicycle.
What's more, you don't have to worry about your bike breaking down because you will find repair shops everywhere you go. However, safety is an issue because people prefer not wearing helmets which is surprising for a city predominantly using bikes for transportation. To make things worse, bikers also flout traffic rules leading to accidents.
If you are new to Beijing a good idea would be to start with ‘hutongs’ which have lesser traffic. Hutongs are narrow alleys that go through areas with residences which have traditional courtyards. This will give you enough practice of Beijing's traffic and you can venture out to larger streets once you get a feel for the city's traffic.