  Masillo [1] commented on our manuscript [2] "Observation of a Fast Evolution
in a Parity-time-symmetric System", pointing out a contradiction of our work
with Ref.[3]. In this reply, we pointed out there is no disagreement between
Masillo's comment and our work in Ref. [2]. The efficiency cost pointed out in
Ref.\cite{masillo} exists, namely to obtain the PT-symmetric hamiltonian
evolution, one has to make a measurement on the auxiliary qubit and the
auxiliary qubit is at state $|0\ket$ only probabilistically. This is reflected
in the amplitude of the spectrum in the NMR quantum simulation. As a result, we
made a small modification in a new version of the Ref. [2], and Fig. 2 of
Ref.[2] has been replaced by spectra of two different $\alpha$'s in order to
illustrate this fact.
