Yun Fang was a very bold and direct girl. She fell in love with Chu Yi at first sight and started to pursue him. Unfortunately, Chu Yi only had Mu Min in his heart. Moreover, the reason why he appeared there to save her at that time was because he was on his way to the countryside to find Mu Min.
Therefore, he rejected her without thinking. Yun Fang did not give up and secretly followed Chu Yi. In the end, she realized that he actually had a lover.
Yun Fang was envious. She secretly cast a Gu on Chu Yi. At the very least, she could mark him so that she could find him at all times while thinking of a way to break up Chu Yi and Mu Min.
Actually, she had many ways to make Chu Yi fall in love with her, but she was proud and did not want that kind of forced love. Besides, she really wanted Chu Yi to choose her willingly. Only then would she feel a sense of accomplishment.