《新唐书·列传·卷一百四十七》
黄钟如得乾卦初九，则自为其宫，林钟四律以正声来应和，象征大君面南提天统于上，乾道昭明。
黄钟得《乾》初九，自为其宫，则林钟四律以正声应之，象大君南面提天统于上，乾道明也。
Huang Zhong, if it is played on the first ninth day of the “Chian” cycle, forms the basic tone for its own mode, and the first four notes of the Zhong Lü scale respond to it with the correct notes, as a symbol that the great sovereign sits facing south, holding the authority of heaven in his hands, and that the way of Chian is manifest.