The major methods of ordaining officials in Song dynasty were
officer, position and job. Besides, achievement officer, jian jiao
officer, san officer, merit level, peerage county etc. The functions of
merit and peerage county were to rearrange nobility and
achievement. Besides, they could match with general office system
and functioned as upgrade. There were so called “matched real with
honor” by Lu Zi. In times of emperor’s sacrifices, announce
amnesty, emperor’s death, chose successor and reward military
merit, government would ordain merit level. The functions of merit
level were to rearrange social order and indicate honor and trust.
Besides, they were used to change status of technical bureaucracy.
If an officer were rewarded merit over the third level, he could erect
halberd in front of his house and promote social status.