The word "上报" (shàngbào) is a compound verb formed through the common Chinese morphological process of combining two meaningful characters (morphemes) to create a new, specific meaning. It is structured as a Verb-Directional Complement / Verb-Object compound: the first character "上" (shàng), which carries connotations of "upward", "to a higher level", or "upwards in a hierarchy", modifies the second character "报" (bào), meaning "to report" or "a report". Therefore, the composite meaning is not simply "up report", but specifically "to report to a higher authority" or "to submit a report upward", effectively capturing the action and its directional/hierarchical target in a single, efficient lexical unit.