《新五代史·列传·杂传第四十》
十二月丙寅，杜重威、李守贞反叛投降契丹，张彦泽也投降了。
十二月丙寅，重威、守贞叛降契丹，彦泽亦降。
On Bingyin day of the twelfth month, Du Chongwei and Li Shouzhen rebelled and surrendered to the Khitan, and Zhang Yanze also surrendered.