  Corona cooling was detected previously from stacking a series of short type-I
bursts occurred during the low/had state of atoll outburst. Type-I bursts are
hence regarded as sharp probe to our better understanding on the basic property
of the corona. The launch of the first Chinese X-ray satellite Insight-HXMT has
large detection area at hard X-rays which provide almost unique chance to move
further in this research field. We report the first detection of the corona
cooling by Insight-HXMT from single short type-I burst showing up during {\bf
flare} of 4U 1636-536. This type-I X-ray burst has a duration of $\sim$13
seconds and hard X-ray shortage is detected with significance 6.2~$\sigma$ in
40-70 keV. A cross-correlation analysis between the lightcurves of soft and
hard X-ray band, shows that the corona shortage lag the burst emission by 1.6
$\pm$1.2~s. These results are consistent with those derived previously from
stacking a large amount of bursts detected by RXTE/PCA within a series of {\bf
flares} of 4U 1636-536. Moreover, the broad bandwidth of Insight-HXMT allows as
well for the first time to infer the burst influence upon the continuum
spectrum via performing the spectral fitting of the burst, which ends up with
the finding that hard X-ray shortage appears at around 40 keV in the continuum
spectrum. These results suggest that the evolution of the corona along with the
outburst{\bf /flare} of NS XRB may be traced via looking into a series of
embedded type-I bursts by using Insight-HXMT.
