  In the presence of energetic particles (EPs) from auxiliary heating and
burning plasmas, fishbone instability and Alfv\'en modes can be excited and
their transition can take place in certain overlapping regimes. Using the
hybrid kinetic-magnetohydrodynamic model in the NIMROD code, we have identified
such a transition between the fishbone instability and the $\beta$-induced
Alfv\'en Eigenmode (BAE) for the NBI heated plasmas on HL-2A. When the safety
factor at magnetic axis is well below one, typical kink-fishbone transition
occurs as the EP fraction increases. When $q_0$ is raised to approaching one,
the fishbone mode is replaced with BAE for sufficient amount of EPs. When $q_0$
is slightly above one, the toroidicity-induced Alfv\'en eigenmode (TAE)
dominates at lower EP pressure, whereas BAE dominates at higher EP pressure.
