Chang'an (824) — the same event in Old Book of Tang and Zizhi Tongjian

Old Book of Tang: Zhang Shao and more than a hundred others reached Youyin Gate, killed the gatekeeper, entered Qingsi Hall, climbed the throne and…

What each source says

Old Book of Tang (Jiu Tangshu), Annals · AD 824 · 長安

Zhang Shao and more than a hundred others reached Youyin Gate, killed the gatekeeper, entered Qingsi Hall, climbed the throne and ate food there.

丙申,賊張韶等百餘人至右銀台門,殺閽者,揮兵大呼,進至清思殿,登禦榻而食,攻弓箭庫。
Location: 舊唐書 卷17上 長慶4年

Zizhi Tongjian (Comprehensive Mirror) · AD 824 · 長安

The dyer Zhang Shao and others, changing their clothes, rush wielding swords into Jinting.

未達所詣,有疑其重載而詰之者,韶急,即殺詰者,與其徒易服揮兵,大呼趣禁庭。
Location: 資治通鑑 卷243

Place: 長安

Show on the map — open Old Book of Tang (Jiu Tangshu), Annals