I believe all low attacks are suppose to beat the parry (same as liu kang) however csz is able to parry certain lows.
can be parried:
Liu kangs sweep
liu kang's b3
cyber sub-zero's b3
cannot be parried:
scorpion's sweep
d3
d4
those are all of the low attacks I tested, I'm sure there are many others. None of these can be parried by liu kang btw
can be parried:
Liu kangs sweep
liu kang's b3
cyber sub-zero's b3
cannot be parried:
scorpion's sweep
d3
d4
those are all of the low attacks I tested, I'm sure there are many others. None of these can be parried by liu kang btw