Cao Cao held the emperor hostage and commanded the princes. Who is the emperor?

Han Xiandi Liu Xie, and holding the emperor hostage to order the princes is Luo Guanzhong's pen to demote Cao. In the official history, it is "to serve the emperor to order but not the minister", "to hold the emperor hostage to order the princes" means to hold the emperor hostage And to control all the princes, and "to serve the emperor with orders but not ministers" is to worship, to respect the emperor and to control the ministers who do not obey the court, "to serve the emperor with orders but not ministers" is the suggestion of Cao Cao's counselor Mao Jie, and to "hold the emperor's hand with the emperor" "To order the princes" was given to Yuan Shao by Yuan Shao's counselor Jushao.