A second chance that was put to good use

Episode 17:
Timeline 2:
Xia Guo and Xue Min find themselves at a crossroads that will inevitably put them further apart from each other. Xue Min even bought the wedding ring, but did not make the proposal to Xia Guo, if he did, she would have quit her job, her promotion and would have gone with him to Singapore, as she is not afraid of new beginnings, but afraid of losing him. He went to work and take the job in Singapore, but he left a message on her cell phone: wait for me, I'll be back, because he said they could always meet on weekends, though she said: that long-distance relationships never work.
Timeline 1:
Yu Jian and Xia Guo are living together but had to give up babysitting. One day they were talking and the baby fell out of bed. At the hospital, the couple regrets the fight they had at home, because of her desire to have a job and he wants them to move back in with his mother's house. And that his mother would be very happy to be with her grandson and with them.
That day when she came home from work tired, lunch was sent by his mother. Yu Jian's mother found out what happened to the baby, and one day, when Xia Guo came home from work, Yu Jian's mother was taking care of the house and the baby. And then she realized that Xia Guo had a fever and made her a ginger soup and made her rest. Xia Guo has a sad surprise, her mother is in the hospital about to die.
Her stepfather said that she had known about the terminal illness for a year but didn't want to tell Xia Guo. At the hospital, her mother, before she died, said goodbye to Xia Guo and acknowledged that she had always been selfish, but in this last year she sought to be a good mother to her and a good grandmother. She said to Yu Jian: Take care of her, I'll leave it in your hands. And he cried and said yes.
PS:
There is a moment in this episode when the two Xia Guo, on a pier, talk and console each other for the death of their mother. But I didn't like Xia Guo's statement from timeline 1. Xia Guo from timeline 2 asks her if she could make a different choice. And she replies that there are no second chances, we just move on. (I don't think that kind of response reflects what the drama shows.)
The choice of Xia Guo, timeline 1 (he was happy, even with problems, was more significant). (What I think is what the filmmakers of the drama mean: that whatever choice we make, there will always be some regret. But I think it looks like it wasn't worth that life. And I see it in the drama that it was worth it, the story of timeline 1).

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