《旧唐书·本纪·卷十》
二十八日，立春，皇上驾到宣政殿，宣读按季节制定的政令，定时入朝参见的官五品以上者升入殿堂之东西两厢坐着听宣读时令。
丙寅，立春，上御宣政殿，读时令，常参官五品已上升殿序坐而听之。
On the 28th, the first day of spring, the emperor arrived at the Xuanzheng Hall and read out the government policies for the season. All officials ranked fifth or above were admitted to the eastern and western wings of the court hall to listen to the reading of the seasonal decrees.