The Bai Jia Xing (Hundred Family Surnames) is a Song-dynasty primer (c. 1000 CE) that lists several hundred Chinese surnames in four-character rhymed lines, beginning with the imperial surnames of the Song and its predecessors: 赵钱孙李 (Zhao, Qian, Sun, Li). It was one of three texts — together with San Zi Jing and Qian Zi Wen, the 三百千 — that almost every child in late imperial China memorized first, recited for the rhythm and the literacy, with no particular doctrinal content beyond a basic social map of the great family names. As a primer it is the lightest of the three: no curriculum like San Zi Jing, no allusive sweep like Qian Zi Wen, just a list — but the list itself is cultural knowledge every Mandarin speaker implicitly shares, and the text is short enough to read in one sitting. Tradition is `secular` for the same reason Qian Zi Wen is: a literacy copybook with no Confucian, Daoist, or Buddhist program. No English translation is shipped: the text is a list of names, so the reader surfaces pinyin and per-surname glosses rather than a prose rendering.