 Choo became notable early in her career as an assemblywoman for being one of the first national politicians to draw public attention to the events of the 1948 Jeju Uprising.She participated in a memorial service for the uprising in 1998, and chaired the first public inquiry into the events the next year.During the debate, Choo released a 200-page dossier listing 1,650 people who had been court-martialed for assisting the "communist rebellion" in Jeju.