Classical singer Chen Shu-chiao, who spent many years studying singing in Italy, says that both the melodies and the lyrics of Cheng Chih-jen's songs are extremely simple; yet their simplicity is part of what makes them so moving.
在義大利學習聲樂多年的聲樂家陳淑嬌分析，鄭智仁的歌曲不管曲子或歌詞都十分簡單，但也因為這份質樸，對人的感動十分直接。