  The chiral string without a singular gauge limit is argued to have the same
critical dimension as its corresponding conventional closed string. Thus, its
central charge would be the same as its conventional counterpart in the
conformal gauge. Here, we would re-examine the critical dimension of the chiral
string in the singular Hohm-Siegel-Zwiebach limit. A straight forward
calculation of the operator product expansion (OPE) of the corresponding
would-be stress tensor shows that the central charge term is not the same as
its conventional counterpart when taking the singular limit. Instead of having
a conformal transformation on the worldsheet, the coordinate reparametrization
provides a set of quasiconformal mappings.
