Envelope = 信封 [xìn fēng] Image text versionsImage 1 text version for "Envelope". English: Envelope. Chinese: 信封. Pinyin: xìn fēng. Audio keys: xin4, feng1. Categories: life, tech. Tags: envelope, macbook_air, apple. Envelope = 信封 [xìn fēng] [xin4] [feng1]