The Addition and Subtraction of Love

In the not-too-distant future, science has developed to the brink of being able to manipulate the flow of time. However, due to ethical reasons and the fear of the unknown, time travel technology has been strictly sealed, existing only in top-secret projects of a few research institutions. However, an unexpected experimental failure accidentally sent the young genius Li Xin back twenty-one years, to the time when his parents were still young.The sudden job loss of the 35-year-old father plunged the entire family into an economic crisis. At the same time, the mother, Tong Yan, was pregnant with her third child. The decrease in income and the increase in expenses, the messy life, also put Tong Yan in a dilemma. Under the pressure of life and emotions, the couple hesitated between whether to have the third child or not.Meanwhile, Li Xin, who returned to the past, witnessed their daily quarrels, and their gradually fragmented life, also faced similar difficult choices...