Home HSK Vocabulary HSK 7–9 公开信 公开信 gōng kāi xìn HSK 7–9 · C2 Meanings open letter Quick facts Traditional公開信 HSK LevelHSK 7–9 CEFRC2 ← Back to HSK 7–9 Overview Practice 公开信 with flashcards MandoBridge uses spaced repetition to help you remember HSK 7–9 vocabulary — free on iOS and Android. ← All HSK 7–9 vocabulary