C728 Let's Join Hands and Get Rid of the Two of Them First

'12/2'

This signified that out of the twelve contenders present, only two would ultimately survive.

Put another way,

the second round's challenge was to be one of the final two standing in a brutal melee involving all twelve participants!

Essentially,

aside from Lin Ze and Shang Qiongsi, who were teammates and knew each other, everyone was an enemy