Watch TV: TV can be watched and paid for.
Watch it on the computer: log on to the CCTV website, and then the browser will prompt you to install a plug-in, which is only a few tens of KB in size, and then you can watch it directly online. If your internet speed is fast, the effect is ok. If your internet speed is not fast, I suggest you use software such as pplive or ppstream to connect to the live broadcast.
In addition: there are live broadcasts on buses, squares and stations.