釋氏稽古略 4.113

4.113

大遼復號大契丹。以幽州為析津府。改元曰開泰。至丙午咸雍二年。復稱大遼。

The Great Liao resumed the title Great Khitan. It designated Youzhou as Xijin Superior Prefecture and changed its reign era to Kaitai. Until the bingwu year, the second year of Xianyong, it once again called itself Great Liao.