China is strategically investing and they don’t care about Africa, only China

Yes, sure, it’s not altruistic. But there’s a huge difference between non-violent trade relationships which benefit one party more, and also benefit the other party, just less, and purposefully ensuring that an entire continent is in a constant state of civil war and desperate poverty so you can extract the maximum amount of resources through slavery. China’s foreign policy is absolutely for its own benefit but they’re taking a “rising tide lifts all boats” approach there and while there are some specific things which are fair to criticise it’s way better than what other major powers are doing.