I've already become a Hogwarts professor, and the system only just appeared.

"Boss Burke, I'm willing to offer 500 Galleons! Now!" Su Yu said in a low voice, continuing to throw out the bait.

The blog owner was clearly tempted for a moment, but then shook his head: "I'm sorry, sir, you should know that the Ministry of Magic has been cracking down hard lately, and we really don't have any left in the store. Why don't you leave your contact information first, and I'll let you know as soon as we have some in stock?"

Ah... this is not what Su Yu imagined. In Su Yu's impression, the black wizards of Knockturn Alley should be the kind of people who only care about money and not people. As long as you pay them enough, they should be fearless.

At this point, raising the price further would seem too deliberate, so Su Yu shook his head and activated Plan B: "Sorry, it's inconvenient for me to leave my contact information. In that case, are you willing to accept the goods?"

"Of course, what do you want to sell?" Boss Burke didn't suspect anything, after all, most dark wizards were unwilling to leave their contact information to strangers.

"What do you think of this?" Su Yu said, taking a box out of his seamless stretch bag.

This was obtained by Su Yu from the short, skinny black wizard who was trading with Quirrell at the Pighead Bar. The box contained three Shadowhounds. By inputting magic power to open it, the Shadowhounds would be controlled by him to attack enemies.

This is absolutely a pure dark magic item. Three Shadowhounds are enough to threaten some ordinary wizards who cannot Apparate. It is worth more than 650 Galleons.

Boss Burke quickly figured out the item's effects. His eyes lit up, and his suspicion of Su Yu lessened somewhat. Only a dark wizard could produce something like this, so he asked, "How much do you want?"

"700 Galleons. Of course, if you have the poison I just mentioned, I'm also open to bartering," Su Yu quoted.

The blog owner hesitated. Bartering was obviously the most cost-effective option, but he had already said no, and changing his mind now seemed a bit inappropriate.

"Wait a moment, I'll go look in the warehouse again. Maybe there are still one or two bottles of poison that haven't been cleared away." In the end, Boss Bock decided to barter. Asking Bock to pay for it was simply wishful thinking.

About three minutes later, the owner of the box office returned to the counter, smiling broadly at Su Yu, and said, "You're really lucky. There's a bottle of poison stuck in the corner that hasn't been moved. We can complete the transaction now."

Su Yu didn't believe a single word the boss of Boke said, but he had already achieved his goal, so the two officially completed the transaction.

But just then, Tonks, who had been waiting outside, pushed open the door and entered, brandishing her wand and pointing it at Boss Burke, saying:

“Karaktacus Burke, I am Shaquille O’Brien, squad leader of the Auror Office of the Department of Magical Law Enforcement under the Ministry of Magic. I suspect you of possessing and selling dangerous dark magic items. You are hereby ordered to surrender and come with me to the Ministry of Magic for investigation.”

Boss Burke recognized Shaquille O'Neal at a glance. He had dealt with this Auror captain before and knew how formidable she was. However, he was currently holding the Infernal Hound box that Su Yu had given him. If he were caught, he would really be going to Azkaban.

Just as Boss Bock was preparing to join forces with Su Yu to rebel, Su Yu suddenly held up the poison Boss Bock had given him and said:

“I surrender, I surrender, I’m willing to testify that Boss Burke traded a black magic poison with me, and it’s in my hands now. What he’s holding is the Shadowhound Summoning Box.”

Boss Boke looked at Su Yu in disbelief, his eyes filled with a huge question mark: No, bro, you surrendered way too quickly.

Before Burke could react, Tonks cast a Binding Charm, and a rope shot out from nowhere, binding Burke tightly.

Two minutes later, Boss Burke and Su Yu were tied side by side to two chairs. Opposite them was Tonks disguised as Saquina, who pointed her wand at Boss Burke:

"Boss Burke, as far as I know, you acquired a batch of dark magic items from Lucius Malfoy yesterday. Where are they now?"

Although the boss of Bock was under control, he had no intention of surrendering, saying:

“I’m sorry, Ms. Saquena, I think there must be something wrong with your information. Mr. Lucius Malfoy only bought some decorations from me and did not sell me any dark magic items.”

"You're not going to tell the truth, are you? In that case, I'll have no choice but to take you back to the Ministry of Magic. Perhaps you'll have a good life in Azkaban." Seeing that the other party wouldn't talk, Tonks pretended to lose patience and was about to take him back to the Ministry of Magic.

Boss Burke quickly said, "Wait, wait, I have something to say. That potion is indeed sold in my shop, but the box containing the corpse dog is not mine. He brought it there, so it has nothing to do with me."

“The poison is enough to get you into Azkaban. Neither of you can escape!” Tonks said coldly.

"No, my potion is fake. It can't kill anyone. It can only make someone appear dead for a while!" Boss Burke had no choice but to tell the truth.

When he said this, the owner of the blog was a little embarrassed, after all, the buyer was right next to him, and it was really awkward to admit on the spot that he was selling counterfeit goods.

But circumstances dictate that the owner of the blog feared that if he didn't speak up now, he might never have the chance again. As for what the buyer next to him was thinking, the owner of the blog couldn't care less.

Moreover, a dark wizard who carries an infernal hound with him is most likely not going to leave Azkaban, so his thoughts are completely irrelevant.

But Boss Burke's words enraged Su Yu. "You old bastard, how dare you use fake potions to deceive me? Are you taking advantage of my poor potion-making skills?"

Enraged, Su Yu snapped the ropes binding him, stood up, and punched Boss Burke hard in the stomach: "You dare to cheat me with fake potions!"

Chapter 79 The Missing Notebook

"You...you...you..." Boss Burke's stomach was cramping, his eyes were bulging, and he almost vomited. He looked at Su Yu in disbelief, then gestured to Shaquille O'Neal with his eyes: "That kid ran away, he ran away!"

Saquina remained unmoved, merely smiling sinisterly as she stared at Boss Burke.

"You...you two are in cahoots? You're entrapping us!" Boss Bock instantly realized what was going on and shouted angrily.

Su Yu gestured for silence: "Shh! Don't shout so loudly. No matter how much you shout, the Corpse Hound is already in your hands. You can't escape."

The boss of Bock immediately deflated like a punctured balloon, but his mind worked quickly: "You went to so much trouble, only to tie me up here. What's your purpose?"

Tonks, pretending to be Saquena, clapped her hands and said coldly, "As expected of the owner of Burke, tell me, what exactly did Lucius Malfoy sell you?"

“I didn’t buy anything from the Malfoys… ugh… cough cough…” Boss Burke was about to deny it when Su Yu’s fist slammed into his stomach again, interrupting him.

"Old man, I advise you to behave yourself, otherwise the truth serum in the magic interrogation room will make you talk, and the Dementors of Azkaban are probably also looking forward to your arrival," Su Yu threatened sternly.

Tonks' tone softened considerably: "Boss Burke, I think you've already figured it out. Our target is actually Lucius Malfoy, so tell us. Once we get the information we want, we'll leave."

After a two-man act, the owner of Burke finally gave in. He coughed twice and said, "Alright, alright, Lucius Malfoy did come yesterday, and he brought..."

After the blog owner finished speaking, Su Yu frowned and asked, "Do you have a notebook? A black-covered one, where you can write and talk to people."

“No, I can guarantee that!” Boss Burke said immediately.

At this moment, the coal ball in Su Yu's arms poked its head out, meowed, and translated through the mental link: "What he said is true!"

Su Yu had just tried to have Coal Ball directly use Mind Control on Boss Bock, but he didn't expect that the old man also knew some mind control techniques. Coal Ball could only judge whether he was lying by some outward emotions.

Su Yu was clearly dissatisfied with the answer, but there was nothing he could do. To avoid trouble, he took out his phone and started recording into the blog:

"Boss Burke, did you get this box containing the Shadowhound from the deal?"

"Yes!" Boss Bock said through gritted teeth.

"And the dark magic items you acquired yesterday, please hand them all over!" Su Yu continued to demand. The entire video recorded the process of Boss Bock taking out the dark magic items, which could also be considered a form of indirect threat.

As for those dark magic items, Su Yu and Tonks naturally packed them up and took them with them. Before leaving, Su Yu thought of something and asked:

"By the way, Mr. Burke, have you heard recently that Lucius Malfoy has been selling something similar to the black notebook elsewhere?"

"No!" Bock's boss denied it outright, but then added:

"Recently, a rumor has been circulating on the black market that someone is selling an item that can open the Chamber of Secrets in Slytherin at Hogwarts Castle. As far as I know, this information may have been leaked by Lucius Malfoy."

"Oh? Did anyone ultimately take on this deal?" Su Yu asked.

"I don't know about that. After all, these kinds of secret transactions usually involve special contact methods and don't go through a third party," said Boss Bock.

When did this news come out?

"It was a long time ago, before the Ministry of Magic took action."

Having gotten the answer they wanted, Su Yu and Tonks didn't make things difficult for Boss Bock any further. He waved the video on his phone and said, "Alright, goodbye Boss Bock. I hope you can sell me the real thing next time I come."

“I hope you never come back!” Boss Burke said with a dark face.

After leaving Knockturn Alley, Su Yu reorganized his thoughts. It was possible that in the original timeline, Lucius Malfoy was indeed going to sell the laptop.

However, under pressure from the Ministry of Magic, no one dared to buy it, and Lucius Malfoy had no choice but to place the notebook in Ginny's cauldron.

From a planning standpoint, this was far from meticulous. If Ginny had given it to her parents, not only would Voldemort have been exposed, but Lucius Malfoy might have been as well.

Then there's another question: who authorized Lucius Malfoy to send the notebook into Hogwarts?

Whether it's Voldemort in his remnant state or Tom Riddle from the notebook, directly asking Lucius Malfoy is obviously unrealistic, but there should be another person who knows the truth, and that is the house-elf Dobby.

According to the information Harry provided, Dobby broke the rules for house-elves and ran away to try to prevent Harry Potter from returning to school because he overheard his master mentioning a conspiracy against Harry Potter.

Dobby the house-elf has most likely returned to Malfoy Manor, but Su Yu knows there's still one chance to catch him: when Harry goes to school.

Based on the current situation, Dobby will most likely do as he did in the original story, blocking Platform 9¾ at King's Cross Station to prevent Harry from boarding the train.

Now that the plan was finalized, Su Yu wasn't in a hurry. It had been a long time since he had gone shopping with Tonks. After returning to the Leaky Cauldron and changing his clothes, Su Yu and Tonks strolled around like any ordinary wizard couple.

"Su, I was so nervous just now. I was really afraid that Boss Burke would see through my disguise!" Tonks said, patting his chest as he walked with Su Yu's arm around him.

"I think your acting is very good. You can tell from Boss Burke's expression. He didn't realize at all that you weren't Captain Saquena!" Su Yu praised.

Tonks stuck out his tongue, then said with some concern, "But won't this cause trouble for Captain Saquena? What if he goes to confront her face to face..."

"Don't worry, we have these videos. Boss Bock will behave himself. He'll even avoid Captain Saquena from now on," Su Yu said without any concern.

Just as the two were having a pleasant conversation, a voice suddenly came from behind: "Professor Su Yu, is that you?"

Su Yu turned around and saw a Chinese girl with black hair and black eyes. She looked to be about thirteen or fourteen years old, a little over 1.5 meters tall, with very delicate features and a gentle demeanor like a young lady from a noble family.

“Zhang Qiu? It’s nice to see you here!” Su Yu immediately thought of this girl, the second-year Ravenclaw witch.

I met her during the last month of last semester when Su Yu was temporarily teaching Defense Against the Dark Arts; she has a very good talent.

Su Yu was deeply impressed by her for another reason: in the future, she would be Harry Potter's girlfriend for a period of time.

Chapter 80 The Missing Notebook

“Yes, it’s me! It’s a pleasure to meet you here! This is my father, he’s also a wizard!” Zhang Qiu was also very happy and introduced him to Su Yu.

Zhang Qiu's father looked to be in his thirties, slightly overweight. Like most Chinese fathers, he showed great respect for teachers. He extended his hand and said warmly:

"Hello Professor Su, my name is Peter Zhang. I immigrated here from Hong Kong. During the fall and summer vacation, they told us that Hogwarts had a Chinese professor, which we found hard to believe! As you know, there are very few Chinese wizards here!"

“Indeed, you are the first Chinese wizard I have ever met in England.” Su Yu shook hands with the other party very politely.

The two chatted happily, and Su Yu even asked about the Hong Kong wizarding community. However, Peter Zhang had come to England at a very young age and didn't know much about the place.

Finally, Peter Zhang gave Su Yu a red envelope, asking him to take care of his daughter after school started. This gesture was very typical of China.

Su Yu initially didn't want it, but after several rounds of refusing, and since it was on the street, he finally had no choice but to accept it.

The amount of money wasn't much, just 50 Galleons, but it was still a considerable expense for Peter Zhang. It seemed he would have to find a way to pay Zhang Qiu back before the end of the semester.

After the father and daughter had walked away, Tonks suddenly said, "There seems to be a strange smell about your student. It's faint, but it feels somewhat familiar."

"Oh? What does it taste like?" Su Yu asked, puzzled.

Tonks shook his head: "I can't quite put my finger on it, but I'm sure I've smelled it somewhere before, though I can't quite place it."

"Don't think about it if you can't remember. Come on, let's go buy you some new clothes!" Su Yu didn't think too much about it and pulled Tonks toward Madam Malkin's clothing store.

Over the next month, Su Yu asked Avery to inquire about the laptop, but Lucius Malfoy was tight-lipped, and there was no news from other channels, so the whole matter seemed to have stalled.

Fortunately, Arthur Weasley is making good progress. With Su Yu's help, he has solved several cases and made several appearances on Toutiao, becoming the most talked-about person in the British wizarding world this summer.

This incident also alerted the owners of the Daily Prophet and the Ministry of Magic to the fact that something was amiss, and they resolved to make sure that the Daily Prophet also had a mobile version.

Therefore, Minister of Magic Fudge, Barnabas Goughfe, editor-in-chief of the Daily Prophet, together with Dumbledore, arranged a meeting with Su Yu and Rita Skeeter.