Cai You's father is Cai Jing. Cai Jing was also a very famous calligrapher in Song Dynasty, and his lover always appreciated each other, so Song Huizong trusted Cai Jing very much and naturally took care of Cai Jing's son. Cai You is very insidious, especially flattering, while Song Huizong ignores the court all day. The imperial power is in the hands of Cai Jing and Cai You. At that time, the Song Dynasty faced two great rivals, Liao and Jurchen, and the tripartite confrontation between the three countries was actually the best situation. However, Jurchen sent people to negotiate with them to destroy Liao together.
Song Huizong freely agreed, sealing the Cai You for leading generals to fight. In order to motivate the general to go to war, Song Huizong asked Cai You what he wanted after victory. Cai You didn't regard him as an emperor at all, saying that he wanted two concubines of the emperor. Song Huizong was a little angry at that time, but war was imminent, so he just laughed it off.
Later, although Liao was captured, only two countries now dominate the world. Jurchen immediately turned to attack Guo Song. Song Huizong nature nasty, immediately consult with CAI you countermeasures, but CAI you unappreciative, also clamoring for the emperor to give him two concubines. Song Huizong was so angry that he immediately beheaded him. War is imminent, and he is thinking about two women. This is not regardless of the opportunity, so in fact, Cai You is confused about priorities, too indulgent and suicidal.