外受傅訓 A Line From The Thousand Characters
娘娘賦性聰明，出身高貴，居皇宮之中，必多覽書籍。記得那本書上有此姓也？」娘娘道：「止《千字文》上有句『外受傅訓』，想必就是此矣。」娘娘赋性聪明，出身高贵，居皇宫之中，必多览书籍。记得那本书上有此姓也？」娘娘道：「止《千字文》上有句『外受傅训』，想必就是此矣。」
逐句解 Line by line
"My lady is clever by nature and nobly born, and living in the imperial palace must have read widely.
Four four-character clauses of flattery in a row before he asks his question. 賦性 is what nature has allotted you — disposition, temperament.
"Do you recall which book has this surname in it?"
那 is nǎ, which — the interrogative again, and the second in this stretch. 得 is dé in 記得.
The Queen said, "Only the Thousand Character Classic has the line 'Without, receive the tutor's instruction' — that must surely be it."
The 《千字文》 is the other great first reader: a thousand characters, none repeated, arranged into a rhymed poem. 外受傅訓 is a real line from it, meaning that outside the home a boy receives his tutor's teaching — and 外 there is an adverb, not a name at all.
The queen finds the surname. She finds it in the 《千字文》, the Thousand Character Classic — a poem of exactly one thousand characters with no character used twice, which Chinese children learned alongside the Hundred Family Surnames. Its line 外受傅訓 does begin with 外.
It is also, of course, nothing to do with surnames. The line means that a boy outside the home receives his tutor's instruction, and the 外 in it is an adverb. She has answered a question about family names by quoting a schoolbook, correctly, in a way that settles nothing at all.
Whether she is playing along is left open, and the text is careful not to say. 想必就是此矣 — that must surely be it — is either helpful or the driest line she gets in the chapter, and the storyteller offers no help either way.