There are two reasons. First of all, a good many of the business visitors who come to Canada are people who work for Chinese government-owned companies. The visa application system is different. It is the Department of Foreign Affairs of the Chinese government that submits the applications, which prevents the establishment of a program able to work quickly. Furthermore, in the case of those business people who work for private companies, processing times are rather short, such that...
On February 15th, 2011. See this statement in context.