《梦溪笔谈·象数一》
皇祐年间，礼部将《玑衡正天文之器赋》作为会试的题目，参加考试的人都混用了浑象的例子，而考试官也不知道其中的道理，于是这些举人被列为及第高等。
皇祐中，礼部试《机衡正天文之器赋》，举人皆杂用浑象事，试官亦自不晓，第为高等。
During the Huangyou era, the Ministry of Rites included the "Ode to the Ji Heng, the Instrument to Correct Astronomy" in the imperial examination questions. All the candidates used the example of the armillary sphere, but the examiners did not know the reasons behind it, and so these candidates were ranked as successful.