信封xìnfēngenvelope (for letters)HSK 5PronunciationxìnfēngExample sentence请你帮我把这个信封寄出去。Qǐng nǐ bāng wǒ bǎ zhège xìnfēng jì chūqù.Please help me mail this envelope.Read and choose an answerOne fixed sampleExplore a sample