I'd add that ananda is already being proven correct as the general public in some of the central african states are demonstrating increasing anger towards chinese mining companies. In australia there are also calls for the govt to stop the sale of majority ownership of foreign comanies with australian resource companies.Sorry, but owning mining rights on other countries does not means strategically can control the mines like in your own country. In short any country can strategically keep the minerals mined in their land regardless who own the mining company. Thus even China own mining company in Africa (for example), US can influence that particullar nation to hold the shipment even to China it self.
the bottom line is that at the first sign of a major problem (eg a war) then states are likely to seize those assets irrespective of who has paid for majority rights.
sovereign rights will trump financial rights every time - the issue of majority foreign ownership of chinese companies already exists in china - and no foreign country can majorioty own chinese resources - so china will not be a position to complain anyway if countries start seizing their resources back to restrict foreign ownership.