Chang'an (784) — the same event in New Book of Tang and Zizhi Tongjian

New Book of Tang: Emperor Dezong returned from Xingyuan to Chang'an.; Zizhi Tongjian: The emperor Dezong's party returns to Chang'an.

What each source says

Emperor Dezong returned from Xingyuan to Chang'an.

壬午，至自興元
Location: 新唐書卷007 德宗·順宗·憲宗興元1年7月

The emperor Dezong's party returns to Chang'an.

壬午，車駕至長安，渾瑊、韓游瑰、戴休顏以其眾扈從，李晟、駱元光、尚可孤以其眾奉迎，步騎十餘萬，旌旗數十里，晟謁見上於三橋，先賀平賊，後謝收復之晚，伏路左請罪。
Location: 資治通鑑卷231

Place: 長安