In the Han dynasty, the bangmu became merely a symbol of the government's responsibility to the people. These were erected near bridges, palaces, city gates and tombs; the name huabiao arose during this time. During the Southern and Northern Dynasties, the Liang dynasty restored the institution of the bangmu, by installing boxes next to the bangmu. Those wishing to air grievances or to comment on government policies could post their writings in these boxes. However, by this time, the column itself was no longer treated as a bulletin board.