The word "报到" is formed by combining two characters, each contributing a core concept to create a new, unified meaning. The first character, "报" (bào), carries the fundamental idea of reporting, announcing, or informing. The second character, "到" (dào), signifies arrival, reaching, or presence. When fused, the compound naturally depicts the specific action of "reporting one's arrival", that is, the process of formally notifying an authority or organization that you have arrived at a designated place, such as a school, workplace, or event, to begin your duties or registration. It is a logical conceptual blend of an action ("to report") with a state ("to have arrived").