Drumroll, please ...
This week's answer: Ping.
A1: Originally, got Taipei 101's floor area from Wikipedia (citing Skyscraper Page), and used an online conversion site to go from square meters to ping. However, Taipei 101's own website gives different numbers, so I used theirs for both square meters and ping. (Which at least confirmed for me that ping are used in Taiwan.)
Taipei 101 is the tallest building in Taiwan and a former tallest building in the world, though now it's the 8th tallest.
Interestingly, Google itself, when asked to convert square meters to ping, instead converts to pyeong, which are different units.
A2: I've never played Magic: The Gathering, so if that slang use seems incorrect, blame my limited research skills. I pulled the concept and synonyms from the Comprehensive Lexicon of MTG Slang on Reddit and Gamepedia.
A3: Rosalind dresses as a young man named Ganymede in As You Like It. (Bonus points if you can identify the other two Shakespeare heroines that fit this trope.)
In The Lord of the Rings, Éowyn masquerades as a man named Dernhelm so she can fight with the army of Rohan before making the Witch King ruminate on word choice in prophecy.
And in Mulan, the title character joins the army by pretending to be a man named Ping.
A4: I'll be honest: I vaguely remember Captain Kangaroo reading The Story about Ping, but the only concrete references to this online come in passing. No video, that I could find. But I left that detail in because, well, I loved Captain Kangaroo.
Basic plot: A duck from a large family doesn't want to get spanked by his owner, so runs away and spends a night on the Yangtze. He's almost prepared for dinner, but a boy frees him in time to go home the next day.
Parents reading the book feel uncomfortable because of the stereotypical yellow-skinned illustrations but can't decide if the story itself is maybe OK, except for the spanking.
Also, this book makes an appearance and provides the thematic underpinning for "New Year's Eve," the season 3 finale of Louie.