Find a time-travel novel

He remembered a scene where the female protagonist was poisoned and needed poison to fight poison with poison. All the poisons in the world had been consumed except for one medicine. At the male protagonist's place, the male protagonist seemed to have given it to his mother (the male protagonist's mother died, and it seemed that this medicine could resurrect his mother). Anyway, his mother did not recover in the end.
live
It seemed like the male lead was a prince (It seemed like his surname was Yu, there seemed to be a description)
I only remember so much
Please, please, let me know if you've seen it. I've seen it once and I want to relive it again, but I can't remember the name.
Do you know? Please, please, I really want to watch it again.

Answer 1

He found a time-travel novel called " Time Travel and Anti-Time Travel." The story was about a modern youth named Li Yun who accidentally transmigrated to an unfamiliar ancient world and became a persecuted princess. After crossing over, Li Yun began a journey full of thrills and adventures. She used her modern knowledge and skills to help the ancient people get out of trouble and protect their homes. In this process, Li Yun gradually realized the drawbacks and problems of ancient society and met another transmigrator, Wang Ming, to explore the relationship between the transmigrator and the transmigrator and the future direction. The plot of the novel was full of ups and downs, and the characters were full. It was a time-travel novel worthy of recommendation.