《梦溪笔谈·乐律一》
地之功从正月开始显示，所以把太蔟放在最前面，完成于八月，所以把南吕放到最后。
地之功见于正月，故先之以太蔟；毕于八月，故终之以南吕。
The work of the earth begins to be manifested from January, so the Taicang is placed at the very front, and it is completed in August, so the Nanlu is placed at the end.