This is what Ravenclaw looks like.

"Professor, where is Diagon Alley?"

"Charing Cross Road, Westminster, London. There is a most famous landmark in the wizarding world, the Leaky Cauldron. After passing through the Leaky Cauldron, you will reach Diagon Alley."

Probably because she had answered this question many times, Professor McGonagall did not even think about it.

"The Leaky Cauldron, Charing Cross Road, Westminster, London," Andrew repeated the location, "Okay, Professor, I've got it down, so how do we get there?"

"Knight Bus, Floo, Apparition or Muggle transportation," Professor McGonagall looked at Andrew and nodded, "If it's in London, I suggest using Muggle transportation, but this place is a bit far and there's no big Floo node nearby, so we Apparition there."

"Apparition? It means - to move a person from one place to another with a spell?" Andrew didn't forget his chatterbox personality, "It sounds like a very amazing spell..."

"Most students will try to learn it when they are adults, but it does require enough magical knowledge and magic as a foundation," Professor McGonagall nodded, "Hold my arm, Taylor, and never let go, otherwise we'll be in some trouble."

Andrew is quick to follow advice, and he will never be self-righteous when facing the unknown.

"Close your eyes, Taylor, and get ready - one, two, three."

As the last word was uttered, a strong darkness surrounded Andrew, and with it came a severe sense of squeezing. He felt like he was diving into the sea, feeling pressure coming from all directions.

But the discomfort soon disappeared, and Professor McGonagall's voice soon came, "Okay, you can open your eyes, Mr. Taylor, a very good apparition experience."

Even in that strong discomfort, Andrew could still hear Professor McGonagall's voice circling around him, as if checking something.

"Is there anything wrong, professor?"

"No, everything is intact, there is nothing to worry about, Mr. Taylor," Professor McGonagall's tone was very certain, "I'm just checking the clones routinely. If you don't catch it, it's easy to have problems."

"As I said at the beginning, one of the consequences of not using magic in a standardized manner?"

"That's right, Taylor." Professor McGonagall nodded, "But now you can turn your attention to something else, this is the Leaky Cauldron."

I've heard of your name for a long time.

If the surname McGonagall is not added with the word "Professor", it is hard to associate it with the magic world, but the Leaky Cauldron is different.

Andrew cast his eyes on the bar in front of him - or rather the tavern. Compared with the bookstore and record store next door, it really lives up to its name.

"It is very suitable for a hidden entrance."

Andrew commented on it, "People around seem to be unable to notice it, and ignore our sudden appearance - is this another new magic?"

"More than one, there are most of the hidden spells here to protect this tavern and the land in front of the tavern, but we need to enter the bar quickly, otherwise it will easily affect others' entry." Professor McGonagall nodded, and she changed her mind again.

Insight and reasoning skills are both good, and there is restraint. Compared with these, that little problem is nothing.

They quickly entered the bar.

Andrew noticed that when the people in the bar noticed that it was Professor McGonagall who came in, the temperature in the bar dropped by at least ten degrees - maybe more than that.

The noise of the drinking contest, the exchanges that were almost quarrelsome, and the hearty laughter disappeared completely, as if someone had used a magic that prohibited sound here.

Not only that, most of the drinkers even seemed to be under some strange spell, and their necks naturally bent down, as if they could not bear the weight of their necks.

In this atmosphere, even Andrew, who wanted to continue to maintain his persona, did not dare to say anything, but just followed Professor McGonagall and walked forward honestly.

When Professor McGonagall greeted the bar owner, Andrew noticed that many eyes quietly swept over, but quickly turned back - but the sound in the bar was still quiet enough to hear breathing.

In fact, it was not until Professor McGonagall took Andrew out of the back door that the sound of the bar rose a little bit, but until Professor McGonagall took Andrew to a wall, the sound there was also frighteningly low.

"Here," Professor McGonagall pointed to the wall, "start from here, three bricks up, two bricks in, tap with your wand."

This made Andrew's scattered thoughts focus at once. He took note of the brick, and then noticed that as Professor McGonagall tapped her wand, the bricks began to move quickly and quickly made way for a wide passage.

"This is Diagon Alley," Professor McGonagall said as she handed Andrew a purse - a very small handbag, and judging from the appearance, the shriveled purse was enough to hold four handbags. Obviously, this was another kind of magic.

"This is the school's exclusive fund, 70 Galleons, used to buy books, wands, school robes and teaching aids, and then 30 Galleons will be provided every year to buy subsequent books and teaching aids for subsequent use - the money is not enough, so I'm afraid you can only buy some of your textbooks second-hand."

(According to Dobby's original salary of 10 Galleons per week, and the wand is likely to be subsidized by the Ministry of Magic, the price cannot be used as a benchmark. Considering the exchange rate issue, it is supplemented outside the book, and there is a patch on the exchange rate change in the ratio of five pounds to one Galleon, so the five-to-one exchange rate when the minimum hourly wage in the UK was 2.45 pounds in 1991 is not set. By the way, the weekly salary of doctors at that time was about 850 pounds, and dentists were even higher.)

"The gold coins in the bag are Galleons, seventeen silver Sickles for one Galleon, and twenty-nine Knuts for one Sickle."

"The items to be purchased are on the subsequent list of the letter," Professor McGonagall said as she handed another letter to Andrew, "Take a look first."

Andrew tucked the purse under his left elbow and opened the letter with his right hand. In theory, he didn't need to read the first page, but he still read it carefully for a minute before turning to the second page of the catalog.

Books of various subjects, school robes, crucibles and materials for brewing potions (he noticed that there was such a course), wands, and even telescopes.

"Sorry, Professor," Andrew thought about the cost of professional books he had learned, and asked with a bit of pain, "Can the currency of the magical world be exchanged with ordinary currency?"

"Of course, we recruit suitable students from the Muggle world every year, but there is a limit on the currency exchange per person each year, and the source of income must be filled in to confirm that it is not illegal income, but Muggle-borns can be exempted from filling in before graduation, but a certificate from the school is required. The current exchange rate is seven pounds to one Galleon."

(Important things are said twice, the original interview clearly pointed out that the exchange rate is variable...)