《旧唐书·本纪·卷十八》
从大中十年今日起，希望天下州郡推举送上的童子，都须要实际年龄在十一、十二岁以下，仍旧须要精通背熟一经，问时能全通晓，而且自己能书写这一经者。
起今日后，望今天下州府荐送童子，并须实年十一、十二已下，仍须精熟一经，问皆全通，兼自能书写者。
From the present day in the tenth year of the Dazhong reign it is suggested that in all departments of the state the Child Candidates should be required to be under twelve years of age, as before, and should again be required to repeat from memory a complete classic, with a thorough understanding of the book, as well as being able to write out a part of it on their own.