The heroine was originally an ordinary student. One time when she was playing Chu Liuxiang, she traveled through time and became a character in her game - a Huashan disciple. She lived in that world year after year. Just when she thought she would spend her whole life there, she... Wore it again! It also comes with a system
The heroine's golden finger is probably that system. The whole story is pretentious. Please don't read it with evidence and timeline. It's all eaten by the idiot author 0v0