  Fast radio bursts (FRBs) are immensely energetic radio pulses with durations
of milliseconds. Given their high all-sky rate, the probability of an FRB being
lensed by an intervening massive object is non-negligible. In this study, we
search for possible lensing candidates within the first Canadian Hydrogen
Intensity Mapping Experiment FRB catalogue using an autocorrelation algorithm
and verification through signal simulations. We identify FRB 20190308C as a
lensed candidate with a significance of 3.4 sigma. Furthermore, we constrain
the mass of the lensing object using the Chang-Refsdal lens model, based on the
flux ratio and time delay between the substructures of FRB 20190308C. Future
long-term and high-precision observations are expected to reveal more lensed
FRBs.
