Way of time travel: The protagonist travels to the Yonghui period of Emperor Gaozong of the Tang Dynasty (around 650 AD) due to accidents (such as archaeological accidents, exploration of ancient ruins, changes in celestial phenomena, etc.)
Identity of the protagonist: Graduate student in the Department of Modern History/Archaeologist/Restorer of cultural relics, possessing historical knowledge and ancient skills
Goldfinger: Limited - the mobile phone/notebook you carry with you contains historical data (limited battery), photographic memory, and modern medical/chemical knowledge
