Sentence given (24)

Chen Zholan stood there with the same dumbfounded expression Chen Gutian had been wearing all this time with Chen Zian showing the same look which quickly turned to shame and then anger.

He had seen and experienced his fair share of duplicity having done it himself a couple of times, even to fellow clan members no less. If it would help him ensure the stability and growth of the Chen Clan, there was no tool he would not use including the manipulation and exploitation of his fellow clan members. 

As a result of the life he led, he had long grown accustomed to painting others with the same brush like how a cheater would automatically assume everyone around them cheats because they do it.

Chen Zian because of his duplicity, always looked at others through the same lens. He always assumed every single person he dealt with had a duplicitous side to them and therefore as a result he was always suspicious of almost everyone... Almost.