This pilot study is to examine whether it is valuable to implement jazz choral practice in Hong Kong primary school setting. The findings can serve as a reference to explore the possibilities of promoting jazz education in Asian countries or in China. The participants were 70 public primary school students from grade 2 to 5 in Hong Kong. All participants were asked to sing jazz warm up exercises written by Kirby Shaw in their choral rehearsals. Both quantitative and qualitative data were collected. Findings were presented from two perspectives--student perspective and observer perspective--in this study. After rehearsals, students were asked to complete a questionnaire related to the response in singing jazz music. Video recording and field notes were captured to observe the behaviour and expression of the participants. Six dimensions of contents were observed during the rehearsal including physical actions, verbal behaviour, expressive behaviour, spatial relations, temporal patterns and verbal records. The results have indicated that it is beneficial to use jazz warm up exercises in the traditional choral practice in Hong Kong primary school setting.