This plot happened in episode 41, when the plot was:

Li Qing returned to her new house and confided to Lin E that they had never had a deep love through Qu En, but he would treat her well for a lifetime and wait for the flowers of love to bloom naturally between them. Lin E revealed her life experience, indicating that she was the girl who was accidentally injured by Li Qing many years ago. Li Qing lamented that everything was predestined, but she still didn't share a room with Lin E on her wedding night.

Extended data:

Yang Liqing: Yang Jia, the third child, is stubborn by nature and always gets into trouble. Since childhood, I have been at odds with my brother, and I was enlightened by communism at Huangpu Military Academy. After years of hard fighting, honest, sincere and optimistic, he gradually grew into an excellent revolutionary soldier. He missed his first love since Huangpu, but he became a revolutionary lover with the widow of his life mentor.

Lin E: Chinese spies are calm, meticulous, rational and not lacking in enthusiasm; When she was a teenager, she accidentally intervened in the "fire accident", leaving a permanent wound, but also forged a lifelong love affair with the Yang family. She replaced Lihua as Qu En's lifelong companion, went undercover beside Beauty, and married Li Qing to have children. Facing the multiple life roles endowed by fate, she sincerely responded.