C1615
Zhang Wenming's office was one office away from Wang Minghao's. After hearing Ding Changsheng leave, Zhang Wenming quickly knocked on the door and went to Wang Minghao's office. He was completely unaware that Ding Changsheng had called for an ambulance. When he looked at Ding Changsheng again, he had already turned a corner and went down the stairs.
The staff didn't know though