Could it be that way? Ning Zhiheng didn't dare to draw a conclusion yet, but the idea was very feasible, and he needed to find some evidence to support it.

Thinking of this, Ning Zhiheng turned to Yu Cheng and said, "Send the body back to the Second Division, and take the manager and the waiter back with you. We'll make a decision after everything comes to light."

Ning Zhiheng was still unsure whether his judgment was accurate, so he brought back anyone suspected of being suspicious in order to prevent anyone from escaping.

Yu Cheng nodded and agreed, "Yes, I'll take care of it right away."

"Did the Gu family keep anyone with them?"

"I left them there. I arranged for a small team to keep watch near the Gu family's residence."

"Act immediately. Arrest everyone in the Gu family and send them to the Second Division. I need to question them."

"yes!"

Ning Zhiheng did not linger. He stepped out of the hotel and, with his guards, rushed back to the Second Operations Division.

Back in his office, Ning Zhiheng sat down and carefully reviewed the day's investigation process.

The case took a sudden turn today. Gu Zhengqing, who was supposed to make contact, was abruptly silenced by his superior without any prior warning.

Ning Zhiheng's investigation of Gu Zhengqing was also a last-minute decision, and the Japanese could not have known about it beforehand.

Where exactly did things go wrong? There must be a lapse in the tracking and surveillance. After leaving the decryption room, Gu Zhengqing only went to three places. One was the dormitory assigned to him by the Military Intelligence Bureau. However, Gu Zhengqing hardly lingered at this location, and it was also under Ning Zhiheng's surveillance.

The second location was the Gu family's residence. He stayed there for more than two hours. Ning Zhiheng also arranged for people to follow and monitor him in the surrounding area, and it was possible that he would be discovered during this process.

Therefore, Ning Zhiheng arrested everyone in the Gu family first, and then conducted a screening process.

The third location was the Huaqing Hotel. Just as he had previously judged, Ning Zhiheng did not believe that there was a problem inside the hotel. The problem must be outside. So where exactly did the problem occur?

Ning Zhiheng felt that everything was in complete chaos, and his mind was filled with all sorts of judgments and guesses, but he couldn't come up with any answers.

Just then, Zhao Jiang came to report that Shao Wenguang had come to see him. Ning Zhiheng nodded, signaling him to come in.

Shao Wenguang strode in, holding a document in his hand, and said excitedly, "Chief, I thought you had already gone home to rest. I just heard a noise and realized you were still in the department, so I rushed to report to you."

Ning Zhiheng smiled slightly and said, "I guess I'll be pulling an all-nighter again tonight. If you need anything, you can come find me anytime. What's wrong? Judging from your expression, did Ji Yongyan ask you to speak up?"

“He’s talking!” Shao Wenguang quickly replied, and he stepped forward to place the interrogation record on Ning Zhiheng’s desk.

Shao Wenguang's words also invigorated Ning Zhiheng: "Well done! I won't look at the records, just tell me what happened!"

Shao Wenguang coughed lightly and replied, "It was really not easy. From last night until now, I have used every means at my disposal. Ji Yongyan endured it for a full twenty hours and was almost turned into an idiot by the electric chair. In the end, he still spoke up."

Get to the point!

"Yes, Ji Yongyan's real name is Yoshida Ryusuke, codename Kurohama. He was a member of the former Shanghai Special Higher Police. This is completely consistent with the information you gave me. We have already grasped his activities in the leak case, so I will not go into details. My interrogation will focus mainly on his superiors."

Six months ago, Yoshida Ryusuke's contacts were transferred to the military intelligence department of the Japanese Central China Expeditionary Army. He was awakened by a high-ranking agent codenamed "Volcano," but Volcano wasn't exactly his superior; they had no contact, except for a brief encounter when he was awakened, after which they never met again.

"A volcano? Montenegro? That's quite interesting! They've even met before?"

"I met him once, but Yoshida Ryusuke's working methods are unrelated to volcanoes. After being awakened, he sends a one-way message every ten days to confirm his safety, and otherwise remains silent, waiting for Xia Bin to contact him."

"It seems that the volcano was only responsible for waking up Yoshida Ryusuke and Xia Bin's group, and did not directly lead them. So how was the Ganbei defense plan transmitted out?"

"Dead mailboxes, they're using dead mailboxes to deliver mail!"