ChineseDramaFan:
Right, at that time when he gives the jade pendant to Qiyuan, Chengxu has already accepted Qiyuan is the Emperor. He just couldn't surrender his own power to the tyrant because he (Chengxu) knows he (the Emperor) would kill him and all his supporters including Chengxuan. Now Chengxuan is gone, he (Chengxu) has no more concern. He doesn't care about that bratty wife of his.
Wait, I am confused. I was talking about the sachet. I take that this sachet was given back to Cheng Xu behind the screen (I might missed it since I did use fast forward ....)??
About the military power. When Qi Yuan was a child, it was reasonable for Cheng Xu to retain it. After Qi Yuan grew up to become a bratty emperor, it was even more reasonable for Cheng Xu to retain it lest the country safety put in jeopardy. After Qi Yuan wanted to kill him, it was also still reasonable for Cheng Xu to retain it for self defense. Now after Cheng Xu lost everything, perhaps he needs to let go the military to the bratty emperor and let the country in mess. How about enjoy his own life for a change ..