Home / HSK Vocabulary / HSK 5 / 外界 外界 wài jiè HSK 5 · C1 Meanings the outside world external Quick facts HSK LevelHSK 5 CEFRC1 ← Back to HSK 5 word list Practice 外界 with flashcards MandoBridge uses spaced repetition to help you remember HSK 5 vocabulary — free on iOS and Android.