They're looking after their interests, Theres a full scale takeover happening here.
First of all china has too many men because of that one child policy screwup so they need some to marry foreign women no matter what. Might as well pick women from a region thats easy to conquer and control and has superior physical genetics as a bonus. Of course Japan wants in on the action, they have dangerously low reproduction levels themselves.
Second, its no secret that african land is blessed, full of resources and you can grow all kinds of food on it. China is a country thats ready to start WW3 over some dry islands in the south china sea, imagine how badly they want african land with all its potential.
Third, we all know arabs run the north and erased egypt to the point where the western and middle eastern world genuinely believes egyptians were never black, whites still have a hold in south africa of course but the sub saharan regions are mostly "up for grabs".
Put it all together and its no wonder this soft invasion is taking place, they're going to make africa the United States for asian people.
They're running it like a corporate takeover, sending in their agents and workers with "investment" and handouts, the founding fathers essentially. 200-300 years from now they'll have chinese leaders and politicians all over the continent and be bytching about immigrants. The only question is whether the chinese homeland can maintain control and prevent the settlers becoming too independant.
As for the old nations, I think the continent is too messed up and divided to fight this kind of calculated attack, even african americans look down on their own cousins and mock their ancestral countries. Its a damn shame but this might be it for africa