Home / HSK Vocabulary / HSK 5 / 自愿 自愿 zì yuàn HSK 5 · C1 Meanings voluntary Quick facts Traditional自願 HSK LevelHSK 5 CEFRC1 ← Back to HSK 5 word list Practice 自愿 with flashcards MandoBridge uses spaced repetition to help you remember HSK 5 vocabulary — free on iOS and Android.