Why did Daming Fenghua Zhao betray Hanwang?

According to the query, iqiyi shows. Zhao Haoqi and Hanwang are not good people. Both of them look down on the prince and are bent on taking him down and fighting for the position of the East Palace in order to plot the future throne. There are two reasons for betraying Hanwang.

1, in order to save yourself, let your strength not be threatened.

Besides Hanwang, I lack a competitor, which is beneficial to my future development.