And I have my privacy fully protected in that environment - unlike in China, where guards have an eye on me when either entering or leaving uni campus.

And I bet those Africans have their eyes on you as a white man, and not in a good way. I personally don't understand why anyone wants to go there to play the good white samaritan,but here's to you. You seem content, so no skin off my nose.

The only real difference to China is that we are using mosquito nets in our bed

Actually in guangdong and the southern provinces you need mosquito nets. Especially in the south of yunnan which is in the tropical belt.