Postwar text of twins. All the jokes used are based on Rowling's settings outside of the book.
Meme:
①. After the death of Fred Weasley, George got closer to his good friend Angelina Johnson (Quidditch teammate, Fred's female companion at the Christmas ball, it is said that they maintained a relationship after the ball until it is unknown after graduation), and later married her and had a son and a daughter. The eldest son inherited the name of Fred Weasley II.
② Ms. Rowling was once asked how George was doing after losing Fred. Rowling said, "George will probably be unable to let go of Fred's passing for the rest of his life." After Fred left, George could no longer cast the Patronus Charm, because every happy memory was related to Fred. George would never be able to conjure a patronus since all happy memories he had always involved Fred.
③. After Fred died, every mirror in the world became the Mirror of Erised for George. To George Weasley, every piece of mirror becomes the Mirror of Erised after Fred's death. (No relevant interview record with Rowling was found, but this joke is also widely circulated in the West.)
Thanks to @HarryPotterSecretStory for the translation of the setting outside the book.
Conception: