The Courtyard House: The story begins with He Yuzhu beating up the White Widow.

Zhao Gu chuckled and joked, "Old Zhang, everyone has witnessed Comrade He Yuzhu's abilities. Does he really need me to take care of him?!"

Zhang Qiang sensed another layer of meaning in Zhao Gu's words and said meaningfully, "Old Zhao! You're still the same as before!"

Listening to the conversation between Zhao Gu and Zhang Qiang, He Yuzhu felt something was off about Zhao Gu. He unconsciously scanned Zhao Gu with his divine sense. What he found shocked him. Besides his apparent identity, Zhao Gu was actually a double agent, working with both the Japanese and the bald man. He Yuzhu couldn't help but mutter to himself, "I never imagined the branch office would be hiding such a big fish?!"

A while later, Zhao Gu left Zhang Qiang's office. Zhang Qiang then noticed something was off about He Yuzhu's expression and asked, "Yuzhu, what's wrong?!"

He Yuzhu asked, "Director Zhang, how much do you know about this Zhao Gu?!"

Zhang Qiang asked, "What do you mean by that?!"

He Yuzhu said, "Director Zhang, just tell me, how much do you know about this Deputy Director Zhao?!"

Zhang Qiang said, "Deputy Director Zhao was transferred here from the Northeast two years ago. As for other details, I really don't know much." Then he asked, "What's wrong?!"

He Yuzhu said, "I was tracking an enemy agent a while ago. He got away halfway through the journey and we haven't found him yet. I never expected to run into him in your office today."

At this moment, Zhang Qiang recalled Zhao Gu's words and immediately realized something was wrong. Zhang Qiang stared intently at He Yuzhu and asked, "You're not mistaken, are you?!"

He Yuzhu replied, "Director Zhang, over the years, I've arrested quite a few enemy agents. When have I ever failed?!"

Zhang Qiang then realized the gravity of the situation. After a few seconds of hesitation, he said, "Don't worry about this. And don't tell anyone."

He Yuzhu nodded and said, "Director Zhang, don't worry! I'll keep my mouth shut! If there's nothing else, I'll be going now; I have a lot of things to do at the station!"

Zhang Qiang rolled his eyes at He Yuzhu and muttered, "Get lost!"

"Hey! I'm leaving right now!" With that, He Yuzhu dashed out of Zhang Qiang's office.

Zhang Qiang smoked two cigarettes in his office, increasingly uneasy. He told his secretary and left. Twenty minutes later, Zhang Qiang appeared at Zhang Hu's office door and knocked. Hearing the knock, Zhang Hu replied, "Come in!"

After receiving permission, Zhang Qiang pushed open the door and entered the office. Zhang Hu, seeing it was Zhang Qiang, smiled and asked, "Why aren't you at the bureau handling the handover procedures? What are you doing here?!"

Zhang Qiang said, "I'm afraid there won't be a way to hand over the work in the short term."

Zhang Hu's expression changed slightly, and he asked, "What's wrong?!"

Zhang Qiang said, "Zhao Gu is very likely an enemy agent." He then relayed He Yuzhu's words to Zhang Hu. Upon hearing Zhang Qiang's account, Zhang Hu's expression instantly turned serious. After two or three minutes, Zhang Hu picked up the phone on his desk and said, "Switchboard, connect me to the fifth group's office."

The call connected shortly after. The voice of Liang Jun, the leader of Group Five, came through the phone: "This is Group Five."

Zhang Hu said, "Liang Jun, it's me! Come to my office now. I have a task for your group!"

"Yes!" Liang Jun replied and hung up the phone.

About five or six minutes later, there was a knock on Zhang Hu's office door. Zhang Hu called out, "Come in!"

Liang Jun pushed open the office door, closed it, and asked, "Director Zhang, what's the mission?!"

Zhang Hu asked, "Do you know Zhao Gu, the deputy director of the Dongcheng branch?!"

Liang Jun replied, "I know?! He was transferred here from the Northeast two years ago."

Zhang Hu said, "We've received intelligence that he's an enemy agent infiltrated among us. However, we don't have concrete evidence yet. Your mission is to obtain the evidence and arrest him!"

"Yes!" Liang Jun responded, "We will find the evidence as soon as possible and bring him to justice!"

After Liang Jun left, Zhang Qiang said, "Zhang Hu, I'm afraid that kid Zhu Zi might be investigating in secret."

"Don't you know that kid's capabilities?! Since he's willing to investigate, let him investigate. Let's see if he's faster, or Liang Jun and the others." After saying that, Zhang Hu chatted with Zhang Qiang about some other things. Seeing that it was getting late, Zhang Qiang said goodbye to Zhang Hu and left.

Days passed by, and Sunday arrived in the blink of an eye. Early in the morning, He Yuzhu took his wife and child to his in-laws' house. They had lunch there. He Yuzhu originally planned to take his wife and child home, but after receiving a call from Song Zhaohong, who was on duty at the police station, He Yuzhu had to leave first.

Upon arriving at the station, He Yuzhu found Song Zhaohong and asked, "Why did you call me here in such a hurry? What happened?!"

Song Zhaohong said, "The branch office just issued a transfer order. They're sending you to the branch office's training class."

He Yuzhu took the transfer order and, seeing that it was signed by Zhao Gu, a smile involuntarily crept onto his lips. He muttered, "I didn't bother you, but you delivered yourself right to my doorstep." Then, He Yuzhu picked up the phone on his desk and dialed the branch office number. A short while later, the branch office operator's voice came through the phone: "This is the Dongcheng Branch Office."

He Yuzhu said, "I am He Yuzhu from Nanluoguxiang. Please transfer me to Director Zhang Qiang's office."

"Please wait a moment!" The operator immediately took the phone back. A short while later, Zhang Qiang's voice came through the line: "Hello! This is Zhang Qiang!"

He Yuzhu said, "Director Zhang, this is He Yuzhu. Are you aware that Deputy Director Zhao Gu of the branch bureau has transferred me to the branch bureau's training class?"

"What?!" Zhang Qiang frowned involuntarily and asked, "When did this happen?!"

He Yuzhu replied, "It was just delivered to our office this morning. I have to report for duty on Monday."

"That Zhao Gu is really talking nonsense!" Zhang Qiang muttered angrily, then said, "Zhu Zi, you don't need to come to the study class. I'll handle this."

He Yuzhu asked, "Director Zhang, will my not attending the training course cause you any trouble?!"

"I said you don't need to go, and you don't need to go! Don't worry about the rest!" With that, Zhang Qiang hung up the phone, hesitated for a few seconds, and then called his secretary, asking her to check on the training course. A dozen minutes later, the secretary returned with a list. Zhang Qiang's expression changed slightly when he saw the list. He never expected that Zhao Gu would start targeting his people before he even left. Zhang Qiang said to his secretary, "Immediately send a notice to these people. Tell them they don't need to go to the training course."

"Yes!" the secretary replied and immediately carried out Zhang Qiang's instructions.