Hua Yan never expected Ye Xiangming to have such a trump card up her sleeve; no wonder she was so composed, showing no fear of being at a disadvantage upon her return to the Royal Palace. She had somehow managed to draw out the Heart-eater Poisonous Insect from the King of Nanjiang, as well as the deeply hidden guards sworn to protect the Princess, all poised to strike at Yun Chi, clearly intending to kill him.
Her plan must be that she would profit from killing Yun Chi, and if she failed to kill him, she still had her ace in the hole, ensuring her own survival.
Therefore, her meeting with Hua Yan today was to use this situation as leverage, to negotiate terms with Yun Chi using her as a bargaining chip.