Park has consistently used bean sprouts as primary subject matter. His work's appearance and internal values undergo modification and expansion. He worked on the Melancholy series with about 1,000 bean sprouts. He spent many years, from the late 1990s to the early 2000s, stitching them to hemp cloth. He made these while engrossed in thoughts of creation and the idea of how to grow life. He identifies his artistic creation with hard labor until his works meet total completeness. Park is troubled by the phenomenon of the uniquely original. His work evokes the thought of being mass-produced, cloned, and deprived from its originality.