I think calling it a "bribe" is needlessly antagonistic. China's policy towards small governments is pretty clear and consistent - "we don't care if you're a colonial puppet, a postcolonial nationalist movement, or religious fundamentalists, we want to do trade with you and we're willing to offer better deals than the Western countries are, up to and including building the infrastructure needed so that we can do more trade with you in the future."
Fair, but everyone seems to be ignoring the fact that these investments/loans are often tied to the extraction and export of Africa's natural resources. (lithium, cobalt, timber, etc.) I understand that global trade is vital for Africa to develop, I just fear people are seeing China's actions in the region through rose-tinted glasses.