Published in conjunction with the exhibition held at Kunstsammlung Nordrhein-Westfalen, Düsseldorf, May 18-September 1, 2019. Includes bibliographical references. "Ai Weiwei" : May 18-September 1, 2019, Kunstsammlung Nordrhein-Westfalen, Düsseldorf, Germany. Text in English, with translations from the German.