Wei Jin's voice was weak, "The Empress is anxious. Now, Wei Jiuzhong's position as Crown Prince is falling apart, and she has angered the Emperor. She probably realizes by now that the Emperor might strip Wei Jiuzhong of his title, demote him to a commoner, or even seek his life. That's why she has come to ask for my support."
Helian Nana put the bowl of abalone porridge aside and said, "Your Highness is right. The Empress has a fierce feud with the Imperial Noble Consort. She is worried that King Fu might totally wipe out the Empress's faction, and hence she has turned to you."
When compared to King Fu, King Rui was definitely a better choice.
The Empress's suggestion is that she will pull King Fu down entirely, leaving him with no chance to inherit the position of Crown Prince. Thus, only King Rui would remain as the heir to the Crown Prince's position.