You're wrong. That's what the west wanted in Africa, and that's why the west would send machines and one or two foremen there to simply extract the stuff and ship it back.

China is shipping a lot of people to Africa, building a lot of infrastructure. The contracts they are signing are not as exploitive as the contracts the western countries signed. They are not doing the same back-hand deals with dictators.

China is playing a much different game, and it's easy to say that they want to exploit, but it's not quite as simple as that.

For example, the chinese are building refineries. The west had little interest in building refineries, they wanted to only extract.

Basically, let's put it this way: The west had more than 40 years of exclusive access to the African mineral industry. It resulted in little development in Africa, and a lot of wars. Whatever china does, it can't be worse.