次序 Simplified/traditional word 次序 English definition cì xù sequence order HSK level HSK 6 Characters 次 (cì): next in sequence; second; the second (day, time etc); secondary; vice-; sub-; infra-; inferior quality; substandard; order; sequence; hypo- (chemistry); classifier for enumerated events: time; 序 (xù): order; sequence; preface;