Ning Zhiheng went to the window again, looked around, and kept thinking.
This situation is indeed very strange, and there are many things that cannot be explained, but the murderer is Gu Zhengqing's superior and also his lover, that should be the case.
He had previously asked Yu Cheng and Bian Deshou, and both of them said that Gu Zhengqing usually did not have contact with improper women, except for a period of time when he had an entanglement with a woman in his family. The timing also matched up.
Moreover, he had also judged that, given Gu Zhengqing's situation, the Japanese would usually try to win him over by using women.
Connecting these lines, could it be explained that the woman taken in by Gu Zhengqing's father was very likely a Japanese spy? Through a series of arrangements, she established a relationship with Gu Zhengqing's father and entered the Gu family, then came into contact with Gu Zhengqing. Afterwards, she used her beauty to turn Gu Zhengqing against his will. However, her relationship with Gu Zhengqing was later discovered, and the female spy left the Gu family, but she still secretly maintained contact with Gu Zhengqing.
In fact, Ning Zhiheng was more inclined to believe that Gu Zhengqing initially had a private affair with the female spy. Even after the spy left the Gu family, they continued to have secret meetings in room 202 of the Huaqing Hotel. Later, Gu Zhengqing gradually became unable to extricate himself and thus became an accomplice of the Japanese.
As for why Yu Cheng's previous investigation did not find any contact location or meeting place at Huaqing Hotel, this is also easy to explain.
After all, before the air raid on Yi Dong, the decoding room was peaceful and there were no problems. Of course, no one noticed Gu Zhengqing's abnormality or investigated him. Later, he rarely contacted his online contacts, sometimes only once every two weeks. So as long as Gu Zhengqing was careful, it would be difficult for others to find out the contact location.
After the air raid, Gu Zhengqing stopped contacting his superiors and never came to the Huaqing Hotel. As a result, Yu Cheng's investigation did not reach this location until Ning Zhiheng used a tactic of alerting the enemy to force Gu Zhengqing to contact his superiors again, which led to the Huaqing Hotel being the focus of attention and the location being exposed.
Now, Ning Zhiheng's next task is to investigate the woman through the Gu family and find her photograph. If the Gu family doesn't have a photograph, Ning Zhiheng will draw one himself, as this will definitely be a very important clue.
Ning Zhiheng turned around and waved to Yu Cheng, who quickly took a few steps forward and came to Ning Zhiheng's side.
"Chief?"
"Has Gu Zhengqing made any phone calls or contacted the outside world while at the Gu family residence?"
No, definitely not!
"Have his family members shown any unusual behavior, or have they had any contact with the outside world?"
"No, in the hour or so after you left, the Gu family didn't make any outgoing calls, only one incoming call, which was an invitation for Gu's mother to play mahjong tomorrow. No one from the Gu family went out either, so Gu Zhengqing shouldn't have had any contact with the outside world during the time he was at the Gu family's home."
"Did he stop along the way or have any contact with the outside world?"
"No, he went straight to the Huaqing Hotel and entered room 202. He didn't stop along the way, and there was no sign of him contacting any outsiders."
“That’s strange!” Ning Zhiheng pondered for a moment and said, “Our transfer of him was decided on short notice. Gu Zhengqing couldn’t have known in advance. He didn’t have any contact with the outside world after he went home, and he didn’t stop along the way. So how did he notify his superior to come and meet him? Surely his superior wouldn’t know as soon as he appeared in room 202?”
Upon hearing this, Yu Cheng also said with doubt, "I had some suspicions before. One possibility is that they have an informant in the hotel. As soon as Gu Zhengqing arrived at Huaqing Hotel, this informant notified his superior."
At this point, Yu Cheng looked towards the door. The hotel manager and the few waiters were still outside, waiting for Ning Zhiheng's instructions.
Ning Zhiheng shook his head and said, "Logically speaking, it doesn't make sense. The fewer people who know about their connection, the better. Having an extra person in the middle is not safe."
Furthermore, based on my judgment, Gu Zhengqing was killed by his superior, who is likely a woman. If they had an inside agent in the hotel who wanted to kill Gu Zhengqing, they would have simply arranged for the inside agent to do it, without the superior risking their own life.
"The one who killed Gu Zhengqing was a woman?" Yu Cheng said in surprise. He didn't know why Ning Zhiheng made that judgment, but the explanation was too bizarre.
Ning Zhiheng nodded and said, "Yes, it should be right. I'll explain it to you later. What I want to know now is how Gu Zhengqing notified his superior to come here to meet. They have met here many times before, so they must have a way to contact each other, but we just can't detect it for the time being."
Yu Cheng said with a headache, "She can't possibly have eyes that can see a thousand miles and come over to see Gu Zhengqing as soon as she arrives, can she?"
Yu Cheng's words stirred something in Ning Zhiheng's heart; perhaps it really was what he had seen with his own eyes!
He suddenly looked out the window again, and through the window, he saw a large residential area across the street.
He could clearly see the lights across the street from here, and the opposite side should be the same, able to see the windows of this room as well. Even if his eyesight was poor, he could use binoculars to easily see the windows of room 202.
It seems I've always overcomplicated things. Actually, it's not that complicated. After Yu Cheng entered the room, he turned on the lights and opened the window. If his superior lived in the residential area across the street, he could see him with binoculars or even the naked eye, and then he could come to meet him.
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