Home / HSK Vocabulary / HSK 3 / 信封 信封 xìn fēng HSK 3 · B1 Meanings envelope CL:個|个[gè] Quick facts HSK LevelHSK 3 CEFRB1 ← Back to HSK 3 word list Practice 信封 with flashcards MandoBridge uses spaced repetition to help you remember HSK 3 vocabulary — free on iOS and Android.