《旧唐书·本纪·卷十八》
中书省上奏说 ：每年正月初一皇上临幸含元殿，百官大臣都进入班列，只有宰相及中书门下两省的官员，在皇帝没有来到之前都站在栏杆之内，待掌扇分列，皇帝驾临，便侍立在皇帝面前。
中书奏： 元日御含元殿，百官就列，唯宰相及两省官皆未开扇前立于栏槛之内，及扇开，便侍立于御前。
The Ministry of the Secretariat reported: Every year on the first day of the first month, the emperor arrives at the Hall of Great Harmony, and all officials enter the ranks. Only the minister and the officials from the Ministry of the Secretariat and the Ministry of the Palace Affairs both stand inside the railings before the emperor arrives, after which they are divided into two rows. After the emperor arrives, they stand on the ground in front of the emperor.