The SQC/MM method was implemented in the on-the-fy nonadiabatic dynamics simulation because of its excellent balance between computational costs and accuracy. . In this method, a quantum Hamiltonian with N discrete states is transformed into a mapping Hamiltonian with N coupled harmonic oscillators . The replacement of quantum operators by the classical ones enables the implementation of the quasiclassical dynamics with the trajectory-adjusted zero point energy (ZPE) correction . The "bin" technique is employed in the initial sampling and in the final assignment of quantum states. As is usually recommended, the triangle window technique is employed in the present work.