The title, borrowed from the dictionary of scientific disciplines, is intentionally ironic. As a matter of fact, things don’t add up in the “Annual Report of the Status of Obsessive-Compulsive Disorder” by Zhang Peili. However, the study of the self and the study of images, through the use of innovative languages applied on various sectors of the industry, are astonishing. Zhang Peili’s exploration inspires him to delve into various forms of the transmission of information in different fields, from medicine to science and industry. The artist mixes various languages with wise artistic intuition in order to attain tangible forms with which to describe the imponderable. Zhang Peili, for example, extracts digital information about invisible body parts from the latest medical technology, and turns them into touchable forms, visualising abstract data. In Common Numbers, the artist employs lighting to produce his image using binary code in a white space. Astonishing and baffling, Zhang Paili’s work offers a new reflection on seeing and being seen.