C516 Whose Poison Was Administered

After hanging up the phone, Zhang Chu Lan went back to her office. In his mind, he was thinking who was the one that poisoned that Superintendent. With his death, who was the biggest beneficiary and who was the biggest victim?

"Big Brother Zhang, you don't look too good. Did something happen?" Seeing Zhang Chu Lan's thoughtful expression, Zhang Long couldn't help but ask out of curiosity