http://www.canadianbusiness.com/busi...gn-investment/
This is a good, relevant article worth reading about Canada's current treatment of foreign investment.
Broadens the discussion beyond Nexen.
Personally, having lived in China and being familiar with Chinese business and cultural practices I can say that I do harbour concerns about large Chinese companies getting taking over important Canadian businesses because of the corruption and dubious practices that are virtually integral to Chinese business. At the same time I see the losses that smaller Canadian businesses face from the fact that Canada now has a poor reputation internationally for investment and that money from countries like China are choosing to go elsewhere, such as Australia, instead because it's so much easier.