分级 (fēn jí) means 'to grade or rank into levels', focusing on assigning a level (like A/B/C or tiers). It differs from 分类 (fēn lèi, HSK5), which groups by type/category rather than by level. Also contrast with 晋级 (jìn jí, HSK7), which means 'to advance to a higher level' — a promotion, not the act of dividing into levels.