Youzhou (821) — the same event in New Book of Tang and Zizhi Tongjian

New Book of Tang: Zhu Kerong detained military governor Zhang Hongjing and rebelled.; Zizhi Tongjian: Zhang Hongjing is confined by a mutiny at Jimen…

What each source says

New Book of Tang (Xin Tangshu), Annals · AD 821 · 幽州

Zhu Kerong detained military governor Zhang Hongjing and rebelled.

幽州盧龍軍都知兵馬使朱克融囚其節度使張弘靖以反
Location: 新唐書 卷008 穆宗~宣宗 長慶1年7月

Zizhi Tongjian (Comprehensive Mirror) · AD 821 · 幽州

Zhang Hongjing is confined by a mutiny at Jimen Post Station, and his staff are killed.

是夕,士卒連營呼噪作亂,將校不能制,遂入府捨,掠弘靖貨財、婦女,囚弘靖於薊門館,殺幕僚韋雍、張宗元、崔仲卿、鄭塤、都虞候劉操、押牙張抱元。
Location: 資治通鑑 卷242

Place: 幽州

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