Everyone has their own logic in their actions, whether it's Qian Cangyi or Wen Chengzhi.
Even though Wen Chengzhi's identity and abilities are very unique, he still follows his own principles. In other words, Wen Chengzhi might make a judgment that is different from everyone else's on a certain matter, but when he encounters the same situation and needs to make a choice again, he will still make the same judgment as last time.
Wen Chengzhi's words just now did not match his actions, because he brought the three of them there to stop another Wen Chengzhi who knew the 'truth', but this issue was not resolved.
So, it was clear which Wen Chengzhi was the one following the group of four.
"Hart!" Qian Jiangyue shouted.
An Ouroboros coin flew out of his hand toward Hart.
It was the Ouroboros coin that Griffin once gave to Qian Jiangyue when he was questioning the three of them.