"—Professor, what does 'finding a world anchor' mean?"
"Are you interested in what Hogsmeade looks like in this world? For example, do you want to know whether the owner of The Three Broomsticks here is Madam Rosmerta, or whether the owner of the Hog's Head is Professor Dumbledore's younger brother..."
"—I didn't know about the relationship between the Hog's Head owner and Professor Dumbledore before, either."
"Mm, in short, compare the similarities and differences between the Hogwarts of this world and the Hogwarts in your own world, and find the common ground between the two worlds... That common ground is your world anchor."
"—That sounds a little profound."
"It's actually very simple. Think of an anchor as a concept you would 'absolutely never confuse.' For instance, Professor Dumbledore is Hogwarts' headmaster, Hogwarts is built within Hogwarts Castle, there is a pub called The Three Broomsticks in Hogsmeade, and the Butterbeer there is delicious. Concepts that remain consistent across both worlds are like rivets fastening two sheets of paper together... When you need an anchor in the future, you'll immediately understand what I meant today."
"—Speaking of 'similarities and differences,' Professor, I remember the Encyclopedia of the Wizarding World mentioning, when introducing Professor McGonagall, that she was a top-tier Registered Wizard. But today, she felt more like those senior professors at First University..."
"Your feeling was correct. Professor McGonagall had already become a senior Grand Wizard."
"—This..."
"You find that unbelievable?"
"—A little."
"The greatest thing about magic lies in its power to make the unbelievable possible. But in Professor McGonagall's case, it still doesn't qualify as a miracle... There's an old saying in China: when one person attains the Way, even their chickens and dogs ascend to heaven. Do you know it?"
"—I think I've heard it before."
"It roughly