
Why he need those women if he has his wife
Spoiler!!!!
He was already married to those women before he married his wife, but he never loved them. One of the concubine was gifted to him by the Eldest Prince, he later send her to the Empress’s son because he had never touched her. He also sent one of his concubine, he never touched her also, to the temple to become a nun because she put aphrodisiac in his food and it caused a bad effect on Jun Qing, who she forgot is also a man. The one he used to favor was only cherished by him in the past because he needed the support from her father. He didn’t really hold any feelings for her. He later divorced her, and I believed he killed her because she attempted to kill Jun Qing. In the end, he only married Jun Qing.
Yoon is just like me when I'm struggling with the feeling of love so I can feel him much more Easier.