1. Consult Yanshan University: You can directly consult Yanshan University to find out whether the underground garage is open for visit. You can contact the school through the official website of Yanshan University, the school portal or the official WeChat account of the school.

2. Consult with nearby shops or residents: the underground garage has entrances or passages connected with surrounding shops or residential buildings. You can consult the nearby shops or residents to find out whether there is an entrance or passage to the underground garage so that you can visit it.

3. Participate in the activities of schools or social organizations: Some schools or social organizations will organize visits regularly or irregularly. You can pay attention to the information about related activities and find out if there is a chance to go to the underground garage.