What does Qin Heng's nine-year contract mean?

Qin Heng's nine-year contract means an agreement between a man and a woman. Madam, Your vest has dropped again is a modern romance novel written by the author. The plot is touching and delicate. Qin Heng and Cheng Juan are the hero and heroine in the novel, which mainly tells the love story of their meeting in the game team. This nine-year contract is an agreement between men and women, and Cheng Juan promises to join the Kyushu Tour professional game team formed by Qin Heng.