Comment on "Anomalous Edge State in a Non-Hermitian Lattice"

Understand

In this comment, we criticize three main conclusions of the letter\cite{Lee2016}.

• We show that the concept of fractional winding number(FWN) is factitious, Lee's conclusions on Fig.
• 3 are finite-size effect and the breakdown of bulk-boundary correspondence (BBBC) cannot be explained by "defective".