Angola’s earth, as in so much of Sub-Saharan Africa, is red. The dust that lifts in the wind during cacimbo (the dry season) is red. The mud that engulfs half of the capital of Luanda during the rainy season is red too. If you walk around all day, it’s likely to stain you – which is why the rich don’t.

But while its good earth hasn’t changed for time immemorial, Angola certainly has. It is now the third largest economy in southern Africa, with much of its new infrastructure built by the Chinese government in return for oil credit – of which Angola, in the top three of African oil producers, can offer plenty.