  The white-light continuum emissions in solar flares (i.e., white-light
flares) are usually observed on the solar disk but, in a few cases, off the
limb. Here we present on-disk as well as off-limb continuum emissions at 3600
{\AA} (in the Balmer continuum) in an X2.1 flare (SOL2023-03-03T17:52) and an
X1.5 flare (SOL2023-08-07T20:46), respectively, observed by the White-light
Solar Telescope (WST) on the Advanced Space-based Solar Observatory (ASO-S).
These continuum emissions are seen at the ribbons for the X2.1 flare and on
loops during the X1.5 event, in which the latter also appears in the decay
phase. These emissions also show up in the pseudo-continuum images at Fe I
{\lambda}6173 from the Helioseismic and Magnetic Imager (HMI) on the Solar
Dynamics Observatory (SDO). In addition, the ribbon sources in the X2.1 flare
exhibit significant enhancements in the Fe I line at 6569.2 {\AA} and the
nearby continuum observed by the Chinese H{\alpha} Solar Explorer (CHASE). It
is found that the on-disk continuum emissions in the X2.1 flare are related to
a nonthermal electron-beam heating either directly or indirectly, while the
off-limb emissions in the X1.5 flare are associated with thermal plasma cooling
or due to Thomson scattering. These comprehensive continuum observations can
provide good constraints on flare energy deposition models, which helps well
understand the physical mechanism of white-light flares.
