Beginnings and Endings movie plot

After the end of the first season, the truth of time travel gradually emerged. From 1888 to 2053, the protagonist (using Xiaobai for the sake of memory) and other friends traveled through time and space, and met their future self and other people in the future. (Old Xiaobai) wants to destroy the world and break the cycle, but one party wants to follow the world and let the cycle continue, (and it is still an ethical blockbuster), the growth process of everyone will be revealed. The time is divided into six timelines: 1888, 1921, 1953, 1986, 2019 and 2053, showing the time view and causality theory of the play (for example, after receiving the news that my father will die today, I want to save it father, and ended up accidentally killing his father). Mainly the plot of the nuclear power plant, the plot of the time machine (the protagonist), the plot of the missing child (the villain (?), and at the end of the second season it was discovered that there is not only one world. The time here begins to show non-linear characteristics. , those missing children did not really disappear, but traveled to another time. They grew up slowly in another time dimension, and everything began to change unpredictably .