《旧唐书·本纪·卷十三》
二十一日，以前任成德军节度副使、检校工部尚书、主持恒府事、清河郡王王士真重新起用授予恒州长史、充任成德军节度使。
辛巳，以前成德军节度副使、检校工部尚书、知恆府事、清河郡王王士真起复授恆州长史，充成德军节度使。
On the 21st, Wang Shizhen, the former vice Jiedushi of Chengde, Minister of Works, and Chenghe Jun Wang, who was in charge of Hengzhou, was reemployed and appointed as the Longshi of Hengzhou and Jiedushi of Chengde.