Xu Hongfei includes instruments in the Chubby Women series because they are integral to the narrative and symbolism of the work. Music is the language of the emotions and appeals directly to the heart. Therefore by portraying the Chubby Women playing instruments, the artist is able to convey their expressive, cheerful and soulful qualities. By creating artworks that free the soul, Xu’s sculptures become relatable to people of different cultures and backgrounds. Moreover, Xu uses a combination of Western and Chinese instruments to emphasise this sense of harmony, such as the piano, pipa, violin, guitar and harp. Additionally, the subject matter of a woman as a musician reflects Xu as a modern sculptor. Additionally, male musicians have been regarded with productive genius, known for their symphonies, operas and oratorios of lasting value. However, through his Chubby Women sculptures, Xu reflects on how women have not been estranged from such musical developments.

許鴻飛經常創作有關音樂的雕塑作品，因為他的創作理念大多有關自由與追尋快樂。他的作品旨帶給觀眾愉快的心情，而「音樂」往往是表現自由的象徵，亦是一種感性的表現。許鴻飛相信人生是為了追求快樂而活的，而創作是為了表達真我，所以「音韻系列」是快樂表現的化身。
他創作的「肥女」雕塑不論手持中式還是西式的樂器，她們的表情都是興奮的。「肥女」們張開嘴巴高聲揚唱，將平常女性含蓄的形象抹去，取而代之的是積極和主動的表現，亦是許鴻飛表達現代女性模樣的表現。
許鴻飛在這個系列除了表達自由之外，他的雕塑技巧亦是賞析作品的重點之一。這一系列的雕塑不單表現女性豐腴的美感，她們四肢的動作誇張並帶有剛勁，這一切都是「力量」的表現。
古語有云「餘音繞樑，三日不絕」以描繪古代女子韓娥在絕望之下，忘卻戰亂之苦，以歌唱求食，最後活出積極人生。所以，後世有「繞樑三日」這成語，以歌頌女子在激昂的音樂下唱出振奮人心的樂曲，令人聽出耳油之餘同時帶出活潑可愛的美態。許鴻飛手下高聲歌唱的肥女便是現代版的「韓娥」，不管困難有多少，她們還是積極樂觀地活出屬於自己的人生。