Tidal locking - an astronomical term that refers to one side always facing the other side with the same side, just like Yu Miaomiao is "locked" by the mental control of Yu Qing and Gu Chenzhou, unable to rotate freely.
Yu Qing is Yu Miaomiao's first star, and Gu Chenzhou is Yu Miaomiao's second star.
Yu Miaomiao's life before the age of 20 was controlled by Yu Qing, and her life after the age of 20 was controlled by Gu Chenzhou.
She used Gu Chenzhou to get rid of Yu Qing, and then used the same method to get rid of Gu Chenzhou.
In the end, she lost everything and finally understood what true love is.
Concept: What is true love?