Oh, I entirely forgot that CSZ did already see the hint that it probably wasn't simple revenge. So they just had to make sure, which they could have done sooner, ITA! Well, the officer does say "I've been waiting for you all morning", so probably the previous day wasn't an option for some organizational reasons, but dammit, come earlier in the morning please, what the hell. (I still want Xiao Guo who was already there waiting outside to just go in and do this, without having any idea what he's doing. xD)