That four-year-old girl was actually a staff member trained by the temple. After Ye Qingmei's death, the temple took back her memory and used brain replacement surgery to revive her.
After rebirth, Ye Qingmei knew that she could not change the world, so she decided to serve in the temple and secretly learned the brain-regeneration surgery at the temple, which restored Wu Zhu's memories before formatting. After Fan Xian ended his life in the "Celebrating More Than Years" timeline, Ye Qingmei privately took back Fan Xian's memories and waited for the right time.
Time passed and dynasties changed. Thousands of years later, humans entered modern society again. Five hundred years ago, the temple finally decided to pass on technology to new humans. Now mankind has returned to the living standards of the 21st century. When the world sealed in the sea of time reappears, Ye Qingmei decides to take Fan Xian to fulfill her wish and reunite with each other.
"Teng Zijing, this is not Niulan Street, and you are not a sparrow."
"Are you willing to let me join you in your future life?"
"Fan Xian, I'm here to keep your appointment."
"My heart is happy with you, and I have no regrets."
Intention: Give Jingxian CP a future