Zhongshang APP can download music directly. The software is based on the superior resources of China Singing Group, uses the Internet as a means, and uses knowledge products processed and reorganized of ethnic music metadata as expressions to provide convenient and comprehensive audio-visual experience and music knowledge service products to the majority of music and art lovers. The online audio provides MP3 formats with 128K and 320K sound quality, and WAV format with lossless sound quality. All relevant content has been digitally restored by the "Chinese Old Records Digital Resource Library" project team. Moreover, the audio of all old records is collected from the metal templates of vinyl records. The sound quality is relatively good, and the sound quality and original appearance of the old records after digitization are retained to a great extent, allowing users to experience high-quality historical sounds at close range. .