Scholar with Jasper Hairpin

Liu Ruyan had been practicing for thousands of years, but the first time she came down the mountain, she fell into the hands of the mortal scholar Zeng Xingshu. The scholar gave her a jade hairpin in exchange for ten years of companionship, and said it was an ancestral love token. She looked at the scholar's handsome and gentle profile and thought that ten years only lasted a moment, so there was no harm in playing with him. Until one day she discovered that this jade hairpin was actually an ancient immortal weapon, specially designed to defeat snake demons. And Zeng Xingshu's body also had a faint dragon aura...