The new film by the Francis brothers, When China Met Africa, is an exquisite fly-on-the-wall documentary following the fortunes of Chinese projects in Zambia. Mr Liu has come with his family and bought four farms. Mr Li is project manager on the rebuilding of a road. Their stories are told by the characters in the film and by scenes and incidents. There is no commentator, no explainer and no script. The camera’s eye and the editor’s selection of shots and scenes are the story.