Why does Jing Ya in "If Time Can Go Back" want to have children with her ex-husband?

Because in this play, we can see that Jing Ya still loves her ex-husband. They divorced because Jing Ya was raped by others and couldn't find a sense of security in her husband, so they thought of divorce.

Jing Ya loves Bai Zhiyong very much. Jing Ya and Bai Zhiyong have lived together for 17 years, and they already know each other very well. They divorced not because they didn't love each other, but because Bai Zhiyong usually likes playing but doesn't like working, and he is not responsible for his family, which makes Jing Ya feel insecure. Jing Ya was raped by several men on his way to work, which deeply hurt Jing Ya's heart. She wanted to talk to Bai Zhiyong, but she never got a chance. After this incident, Jing Ya realized that his married life with Bai Zhiyong had become estranged, and Bai Zhiyong did not assume a man's responsibility to his family, so Jing Ya chose to divorce Bai Zhiyong. After the divorce, Jing Ya did not start a new life, but still took care of her ex-husband's life. He often goes home to help Bai Zhiyong clean up the housework and cook for Bai Zhiyong. When Bai Zhiyong had no money to eat, he first thought of borrowing money from his ex-wife. This detail also represents that although two people are divorced, they are the most important in each other's hearts.

After divorcing Bai Zhiyong, Jing Ya felt lonely. Seeing that other people's families were happy, he had the idea of having children, so she found her ex-husband Bai Zhiyong who wanted to have a child with him and became a single mother. Jing Ya's practice is also a test for her ex-husband, Bai Zhiyong. He hopes that Bai Zhiyong can become a responsible man and continue to live with himself.

Jing Ya's life in this play is rather boring. He usually doesn't like to have too much contact with boys and has no good male friends around him, so he can only find his ex-husband when he wants to have children. When two people have a common child, Jing Ya can be with Bai Zhiyong.