It's my sister Princess Luyuan. In Liu Ying's childhood memory, the best thing for him is his sister. When he was born, his family had a hard time. Father Liu Bang is a gangster, and mother is busy subsidizing her family. In his caring childhood, his sister was the only source of warmth.

During Liu Bang's uprising, Yuan Lu and Liu Ying were embedded in the army. In the military camp, the conditions were difficult, and their father's attitude towards them was also very cold. For countless nights, young Liu Ying fell asleep under the protection of her sister.

In the hard years of Chu-Han struggle, Liu Ying was only accompanied by her sister Princess Luyuan, who took care of her younger brother Liu Ying, and they lived alone.