From BBC News:
Opponents of the death penalty condemn China’s record on a number of fronts.
Firstly, there is the secrecy surrounding the judicial process that makes it impossible to find out whether the accused has had a fair trial or not.
That means of course that it is uncertain how many criminals are executed here.
Human rights groups based abroad estimate that China executes more people each year than the rest of the world put together – although there is quite a disparity between their figures.