  We will extend the study of the new generalized Chaplygin gas (NGCG) based on
[JCAP 0601(2006)003]. Concretely, we will not only discuss the change rates of
the energy densities and the energy transfer of this model, but also perform
the $Om$ diagnostic to differentiate the $\Lambda$CDM model from the NGCG and
the GCG models. Furthermore, in order to consider the influence of dark energy
on the structure formation, we also present the evolution of growth index in
this scenario with interaction.
