蔡美彪先生曾撰有《遼代后族與遼季后妃三案》一文,發覆索隱,將遼朝歷史上久已堙没的后族派系與政治鬥爭清晰地呈現在讀者面前,成爲學界公認的研究遼朝政治史的經典之作。蔡先生指出遼朝的衰微並非由於宗室與外戚、帝黨與后黨之爭,而是由於后家述律與審密兩大族系形同水火,述律氏家族一再展開權位爭奪所致。遼季后妃三案是蔡先生創擬的題目,它包括聖宗齊天后案、道宗懿德后案、天祚帝文妃案〔1〕。三案之中,以道宗懿德皇后(後改謚宣 Mr. Cai Meibiao once authored the article “The Three Cases of the Later Liao Dynasty and the Later Empresses and the Concubines of the Liao Dynasty.” They published a series of remarks and made a summary of the factional struggles and political struggles of the late Liao Dynasty in the history of the Liao Dynasty before the readers and became recognized by the academic circles Study of Liao dynasty political history of the classic. Mr Choi pointed out that the decline of the Liao Dynasty was not caused by the clashes between the clan and the foreign, the imperialist and the rear parties, but by the fact that the two clans of the latter’s law and censorship were in the same situation and that the Clan’s family had repeatedly competed for power. The three cases of the late imperial concubine were created by Mr. Cai. These include the case of Shengzong, the case of Yi Zong and the case of Emperor Wen Fei. Among the three cases, the Taoist Emperor Yi Tak (later changed 谥 宣