 Yang considered sending Gao Yan and Gao Zhan outside the capital to be provincial governors, but Emperor Fei initially disagreed.Yang wrote a submission to Empress Dowager Li to ask her to consider, and she consulted her lady in waiting Li Changyi, who leaked the news to Grand Empress Dowager Lou.She informed the two princes, and they set up an ambush, with Gao Guiyan and the generals Heba Ren and Hulü Jin, at a ceremony where Gao Yan was to be named to a ceremonial post.