  In this paper, we consider the intercritical inhomogeneous nonlinear
Schr\"odinger equation. For the radial symmetry initial data, we construct the
ring blow-up solutions and obtain blow-up speed. This result implies that the
upper bound on the blow-up speed given by Cardoso and Farah [J. Funct.
Anal.,281(8) No. 109134, (2021)] is sharp.
