  We investigate slow quenches in Chern insulators in ribbon geometry. We
consider the Qi-Wu-Zhang model and slowly ramp the parameters (large time of
the quench $\tau$) from a non-topological (Chern number = 0) to a topological
regime (Chern number $\ne$ 0). In contrast to the Haldane model considered in
[L. Privitera and G. E. Santoro, Phys. Rev. B 93, 241406(R) (2016)] earlier,
the in-gap state degeneracy point is pinned to an inversion symmetric momentum,
which changes the behavior drastically. The density of excitations in the
in-gap states scales with the quench time as $\tau^{-1/2}$ as the ramp becomes
slow, and the Kibble-Zurek mechanism applies. Despite the slower scaling of the
density of in-gap excitations with $\tau$, the Hall conductance after the
quench deviates from that of the ground state of the final Hamiltonian by an
amount that drops as $\tau^{-1}$.
