White Snake: I am a swordsman

Description

Xu Xian, a peerless genius, wielded the Immortal Killing Sword to shatter the void, but did not ascend to the immortal world. Instead, he was reincarnated into a baby with the same name in Hangzhou City.
Somehow, babies carry great karma and occasionally attract the gazes of immortals and Buddhas.
In order not to expose his identity, he could only play "Xu Xian" for twenty years, and gradually became a famous benevolent doctor in Hangzhou.
Xu Xian didn't care whether he was a benevolent person or a doctor. He only cared about the cause and effect that had bound him for twenty years.
Once the cause and effect is resolved, he can ride on the wind and become a peerless swordsman for another lifetime!
However, when he picked up the pearl hairpin on the West Lake Bridge and met the eyes of the woman in white, he realized that the problem was not simple...