In 2008, an earthquake devastated Sichuan province in China, claiming the lives of more than 69,000 people. Following accusations from parents that substandard construction caused the collapse of schools across in the region, the artist Ai Weiwei set upon a political investigation that would name every missing student and call the government to account for their deaths.

In the fourth episode of The Start, we hear how this investigation brought about Remembering, an installation of 9,000 school backpacks on the Munich Haus der Kunst, that both commemorated pupils and engendered a new sense of political duty within Ai Weiwei’s work.