The appointment of Changbai Mountain on August 17, 2025 is a complex for all fans of Tomb Raider Notes. According to the book, the Old Nine Gates stipulated that the people of the Old Nine Gates must take turns to guard bronze doors's secret for a period of ten years and change it every ten years. Bronze doors in the book is located in Changbai Mountain, which is the Changbai Mountain Range in Jilin Province.
Changbai Mountain is located in the southeast of Jilin Province, bordering Heilongjiang Province and Liaoning Province in the north and southwest respectively, and bordering North Korea and Russia in the southeast and east respectively. Changbai Mountain runs northeast-southwest with an altitude of 1000 meters above sea level. In August 15, 17, many fans went to Changbai Mountain for a date, and in August 2025 17, it will be a date in the next ten years.