'Some time ago I asserted that Liu Xiaodong's way of painting is "Dirty Realism". Today, the world has become even dirtier, and it needs to be faced in a "dirtier way"! John Yau's book recommends us to look at and research his work more comprehensively. This is not only to remind us that painting (as a way to "intervene in reality") can remain a significant way to continue to live. It also helps us, through exploring Xiaodong's particular and "dirty" way of "intervening in reality" ("to mingle with the dirty world but not to be made dirty by it"), confront this dirty world bravely but also peacefully.'
- Hou Hanru, Artistic Director, Maxxi, Rome