It demonstrates how art and politics are inherently intertwined. We expect political statements when they're delivered on podiums or with policy briefs.

In 2015, China handed back something of great value to Ai Weiwei: his Chinese passport. The move allowed the dissident artist to travel for the first time since authorities revoked his document in 2011 - the same year he spent 81 days in secret government detention for alleged tax evasion.