The man disguised as a delivery worker wasn't foolish; he didn't abruptly knock on the door. Instead, he spoke as if he were still a delivery worker. In such a situation, most people would likely not have realized, and indeed might have thought the delivery worker had returned.
By speaking this way, even if the person inside hadn't been poisoned, they wouldn't suspect he had other intentions. Thus, he was able to probe the situation inside the room.
However, the key issue was, Ye Qing was no longer in the room. He came to knock on the door now, naturally receiving no response.
After waiting for a while without any response, the delivery worker's heartbeat quickened involuntarily. He wasn't aware that Ye Qing had already escaped, and believed Ye Qing had been poisoned, which would be a major event for them. If Ye Qing was poisoned, wouldn't that mean they all would become The Tycoon?
