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A recent paper by L.~Zheng [Phys. Plasmas, 30, 042515 (2023)] presented acritical analysis of standard Lie-transform perturbation theory and suggestedthat its application to the problem of charged-particle motion in a magneticfield suffered from ordering inconsistencies. In the present Comment, wesuggest that this criticism is unjustified and that standard Lie-transformperturbation theory does not need to be modified in its application toguiding-center theory.

Comment on "Modification of Lie's transform perturbation theory for charged particle motion in a magnetic field''