In the Chinese legal system through the dynasties, there is no concept of 'innocent until proven guilty'.  This and using torture to obtain confession has a long tradition in Chinese history.  Just that the Chinese Communist Party makes it the 'practice' and unwritten 'law' of the land, and perfects it into the Party and State apparatus.  That it will improve and the 'double designation' system will change (as speculated by the professor in Beijing) is extremely unlikely because this violent State machinery is essential in secure and ensure the rule of the Party which has showed many times during the nearly past seven decades that it will do anything to stay in power.  As much as I hate to see those corrupt officials (it can safety assume that almost all government officials take bribes which grease everything going on in China) hidden in Canada with their ill gotten gain, we should think twice to extradite them back to China.