HP: I was doing all sorts of things at Hogwarts

"The British entry and exit records are too clean. If the two incidents in China were also committed by British wizards, and he went to China, of course there would be records there."

Sirius nodded, "What if there is no record?"

Avro pondered for a while and said nothing.

"Let's go try," Avro suddenly said, her eyes falling on her and Sirius's intertwined hands, "Look at the records of the Chinese Ministry of Magic."

Sirius frowned, "Why is this..." Before he finished speaking, an idea suddenly flashed across his face.

"I understand." Sirius tried his best to ignore Aphra's pale face. Apparition at such a distance not only consumes a lot of magic power, but is also harmful to the human body.

……

"Drip-drip-"

As soon as Sirius and Aphra stepped into the auditorium with thousands of people, they heard the sound of sirens in the auditorium.

Avro didn't know where the detector of the Chinese Ministry of Magic was, so the two of them followed the source of the sound.

Arriving at a small room on the third floor, Aphra gently opened the door. The door was only ajar, and there was a man standing inside.

"Hello," the man said with a smile, "You can call me Lao Gu."

"Hello, Avro Greengrass," Aphra's eyes fell on the detector without speaking.

Lao Gu also followed her gaze and smiled slightly, "I heard some movement in the detector and wanted to take a look."

"What's wrong?" Xiao Xu hurried over, still confused, "Hey, Afu, are you back?"

"I have a question," Avro walked to the instrument, and Lao Gu moved away so that she could observe the detector directly.

The detector showed people who had entered the country illegally in recent days, including Aurora Greengrass and Sirius Black.

"How long can this record be displayed?" Avro asked Lao Gu.

"The 14 days are all shown on it. You are the only ones who have entered the country illegally recently." Lao Gu answered her.

"Sorry, we are in a hurry to get the information." Sirius just said this as he changed the topic.

Lao Gu didn't dwell on their illegal entry, and just nodded, "I'll get it for you."

"There is also a list of normal entry and exit." Avro added.

"Okay." Lao Gu simply agreed and left.

Xiao Xu tilted his head, "Afu, do you have any ideas?"

Avro shook her head, "I don't have any thoughts. Where is Lao Mu?"

"I'm sweeping the floor," Xiao Xu said habitually, "I don't know where I'm sweeping."

"Oh." Avro nodded, not wanting to chat with Xiao Xu.

Lao Gu came back soon and handed two pieces of information to Avro, "Here, let's take a look at the information you want."

Avro first opened the entry-exit file, which only registered the names of Avro and Sirius.

"..."

No, are they really the only ones entering and exiting during this period?

So clean.

Avro closed the file and looked unclear.

"Are Xiao Xu investigating the two wizards from China?" Avro asked again.

Xiao Xu nodded, "Yes, I have visited them in the past few days. The girl is an orphan, and the boy is from a Muggle family. Friends say that there is nothing unusual about them recently, and they have not offended anyone."

Lao Gu also sighed, looking unsure, "Originally, I planned to investigate this matter myself, but Lao Mu insisted on letting Afu come."

"Lao Mu's words are always right. We all believe in Lao Mu, right, Lao Gu?" Xiao Xu said indifferently.

"Thank you for your hard work, Afu. I have never encountered this kind of thing before. I wonder if you can handle it smoothly." Lao Gu continued.

Xiao Xu waved his hand, "What's wrong with this? If Afu takes on a few more cases, won't he naturally gain experience?"

Avro and Sirius looked at each other. Avro felt that Lao Gu was yin and yang and was chatting over tea.

"I'm going to the bathroom."

"I'll go with you." Sirius immediately understood what she meant and said without thinking.

"?" Xiao Xu looked at the two of them with a strange look.

Avro and Sirius left the auditorium of thousands of people, and Avro was a little frustrated.

"Don't you think Lao Gu was talking bad about Lao Mu inside and out?" Avro added, "Lao Mu is the old fortune teller - oh, you weren't there at the time."

"I wasn't there at the time, so who was?" Sirius asked.

"Everyone is here except you." Avro answered him casually.

"Huh?" Sirius was confused.

"To be serious," Avro got back to the point, "there are no other names in the lists of the Ministry of Magic on both sides. Either there is no entry or exit, there are murderers on both sides, or the lists on both sides have been tampered with."

"After all, there are murderers not only in the British Ministry of Magic, but also here..." Sirius was very worried, "Is there a possibility that we can directly feed everyone the Veritaserum?"

"You're awesome," Avro complained, "Maybe you can get through it on your own, but I'm afraid that by the time you get through it, all the flowers will wither."

"Then...how did that person get the love potion?" Sirius looked at Avro, "The content of the love potion detected was quite high. Did he brew so much of it himself? Or did he buy it from outside? ?”

"A good question," Avro praised him, "but the scope is too large to be investigated."

"Just investigate whoever you suspect," Sirius thought for a moment, "Rufus Scrimgeour? Or Jenny's boss, Ford Cooper?"

"Could it be Scrimgeour?" Avro frowned, "There are too many flaws and his motives are too obvious. I don't believe that since he can reach the top, why would he have these things that make us suspicious?"

"As for Cooper, the last time we contacted him, he didn't ask for anything different. You can put it aside for now."

Sirius scratched his head and began to wonder why he wanted to take this task. No wonder he didn't take it and left it to him!

"Then let's start from here. There must be a mole here." Sirius said with a certain tone.

Avro lowered her eyes, "Why?"

"Intuition," Sirius said half casually and half seriously, "I think that Lao Gu is very suspicious."

"Since you have suspicions, let's go investigate." Lao Mu appeared out of nowhere. He was sweeping the ground with a big broom, his beard was trembling slightly, and he looked calm and composed.

"Old Mu." Avro glanced up and down at Old Mu. He was wearing a yellow-green fluorescent suit and looked like a real sweeper. Was he really a sweeper?

Lao Mu swept the floor slowly and spoke slowly, "I haven't seen you for a few days. You are tired. I asked you to make up for it, but you didn't listen."

"Didn't you ask me to investigate?" Avro asked doubtfully.

Lao Mu choked at her words and stroked his beard guiltily.