  Over a period of multiple active episodes between January 2021 and January
2022, the magnetar SGR J1935+2154 emitted a total of 82 bursts observed by
GECAM-B. Temporal and spectral analyses reveal that the bursts have an average
duration of $\sim$145 ms and a fluence ranging from $1.2 \times 10^{-8} \
\mathrm{erg \cdot cm^{-2}}$ to $3.7 \times 10^{-5} \ \mathrm{erg \cdot
cm^{-2}}$ (30 - 200 keV). The spectral properties of these bursts are similar
to those of earlier active episodes. Specifically, we find that the emission
area of the Double Black Body (BB2) model shows a Log-Linear correlation to its
temperature, and there is a weak relation between fluence and
$E_{\mathrm{peak}}$ (or $\alpha$) in the Cut-Off Power Law (CPL) model.
However, we note that the temperature distributions of BB2/BB models in GECAM-B
samples are different from those in GBM-GECAM samples, due to differences in
the energy range used for fitting. To understand this difference, we propose a
Multi-Temperature Black Body (MBB) model, assuming that the BB temperatures
follow a power law distribution. Our analysis shows that the minimum
temperature $kT_{\mathrm{min}} \sim 5$ keV of the MBB model, which is
consistent between GECAM-B and GBM-GECAM. This indicates that both samples
originated from similar magnetar bursts. We also reveal the spectra of magnetar
bursts tend to be soft. It indicates that magnetar bursts may be composed of
multiple low BB temperatures and the majority of the BB temperatures are
concentrated around the minimum temperature.

High Energy Astrophysical Phenomena