The theme for the biennial’s 12th iteration is “​Proregress—Art in an Age of Historical Ambivalence.” According to a statement on the biennale’s website, this title refers to a sense of instability felt around the world these days. Curated by Cuauhtémoc Medina, chief curator of the Museo Universitario de Arte Contemporanea in Mexico City, this year’s biennial will feature 67 artists, making it a much more compact than the 2016 edition, which included more than 90 artists. 30rmb.