According to Tencent's video, You Jian and Li Hua met by chance, attracted each other and started a short relationship. They don't have a deep understanding of each other's personality, values and life experiences, and lack sufficient communication and understanding. Ding Youjian's acceptance of the reform is a great blow to Li Hua.
Li Hua can't accept her boyfriend doing such a thing, which makes Li Hua feel very disappointed and painful. Li Hua began to re-examine this relationship and realized that his relationship with Ding Youjian was not stable.