Yes, Fan Ruoruo was Fan Sizhe's sister. Although they were not related by blood, they were half-siblings. Fan Ruoruo was Fan Jian's biological daughter, while Fan Sizhe was born to Fan Jian's second wife, Liu Ruyu. Their relationship in the movie was very close, more like brother and sister.

Yes, Fan Ruoruo and Fan Sizhe were siblings. They were half-siblings, and Fan Ruoruo was Fan Sizhe's older sister.
Yes, Ruo Ruo was Fan Sizhe's sister. Although they were not related by blood, their relationship in the movie was very close, more like brother and sister.
Yes, Ruo Ruo was Fan Sizhe's sister. Although they were not related by blood, they were half-siblings. Fan Ruoruo was Fan Jian's biological daughter, while Fan Sizhe was born to Fan Jian's second wife, Liu Ruyu. Their relationship in the movie was very close, more like brother and sister.
In the end, Fan Ruoruo married King Jing, Li Hongcheng. Although Fan Ruoruo had always liked Fan Xian, Fan Xian treated her as his own sister and had no feelings for her. In the end, Fan Ruoruo was moved by Li Hongcheng, who had accompanied her for more than ten years, and chose to marry him.
Fan Ruoruo's mother was Fan Jian's first wife. Although the novel and the TV series did not reveal her mother's clan and name, Fan Ruoruo's mother was Fan Jian's wife. Fan Ruoruo's mother died of grief after learning that Fan Jian had swapped her son with Fan Xian.
The novel I recommend to you is " Little Lady of the Marquis ". It's an ancient romance novel. The story was about the misunderstandings between the female protagonist Gao Lanxin and the male protagonist Wen Heng. However, after their rebirth, they were finally able to continue their relationship. The female lead's sister was called Ruo Linglong, but the female lead's name was not Ruo Xiaoxiao, but Gao Lanxin. I hope you will like this novel.
In the end, Ruoruo ended up with Li Hongcheng, the son of King Jing.
In " Celebrating Years," Fan Ruoruo did like Fan Xian. She had developed feelings for Fan Xian since she was young, but Fan Xian saw her as his biological sister and had no feelings for her. Although Fan Ruoruo had always liked Fan Xian, in the end, she chose to marry King Jing's son, Li Hongcheng. Fan Ruoruo's heart was moved by Li Hongcheng, who had accompanied her for more than ten years, and she finally made this decision. Although Fan Ruoruo liked Fan Xian, she did not end up with him.
In " Celebrating Years," Fan Ruoruo did like Fan Xian. She had developed feelings for Fan Xian since she was young, but Fan Xian saw her as his biological sister and had no feelings for her. Although Fan Ruoruo had always liked Fan Xian, in the end, she chose to marry King Jing's son, Li Hongcheng. Fan Ruoruo's heart was moved by Li Hongcheng, who had accompanied her for more than ten years, and she finally made this decision. Although Fan Ruoruo liked Fan Xian, she did not end up with him.
Wu Zhu and Ruoruo were master and disciple. Wu Zhu had chosen Fan Ruoruo as his personal disciple, and he trusted and was very close to her. Fan Ruoruo had a steady and determined personality. She was able to handle things and had outstanding talent. Fan Ruoruo was also one of the people Fan Xian was closest to and trusted. Wu Zhu had chosen to give Fan Ruoruo the method to use the Barrette. It was mainly to ensure that one day, when Wu Zhu was unable to accompany Fan Xian for some reason, Fan Ruoruo would be able to protect Fan Xian's life. Fan Ruoruo became a sniper expert under Wu Zhu's training and played an important role in the final battle. Thus, Wu Zhu and Ruoruo had a master-disciple relationship, and also a close relationship of trust.