The Jade Mine's office had already been completely handed over to Gu Cheng.
And after receiving the approval of Old Patriarch Gu, Uncle Gu indirectly told Zhang Yi about the affairs of the Jade Mine.
One, because Zhang Yi had always been loyal to Old Patriarch Gu.
Two, because Zhang Yi was very familiar with everything about the Jade Mine, almost knowing it like the back of his hand.
Therefore, when Gu Cheng found out that the Jade Mine lacked even a single piece of jade rough stone and only had ordinary rocks, he definitely would not be able to just grin and bear it.
He would definitely go and ask Old Patriarch Gu for clarity.
By that time, Zhang Yi would naturally understand, so continuing to hide the truth would also alienate him.
Moreover, Old Patriarch Gu wasn't worried—if one understood, they understood; if they didn't, they could claim they were deceived.
It's a matter of "Different strokes for different folks."
But Uncle Gu couldn't possibly go into details either.