The word "晋级" is formed by combining the character "晋", meaning to advance or promote, which is composed of "日" (sun) over "至" (to arrive), historically evoking the idea of progression, with the character "级", meaning level or rank, composed of "纟" (silk thread) and "及" (to reach), originally denoting a step or tier. Together, these characters semantically merge to express the concept of advancing to a higher rank or level.