Many foreign universities have virtual tours. The website of UC Riverside is divided into different areas according to different majors, including engineering, humanities, science, medicine, student dormitory, student life and so on. On Reddit (similar to Baidu Post Bar), UC Riverside has its own page, which is almost full of all kinds of information and discussions at the University of California, Riverside. From your plans after graduation, the problems that freshmen will encounter, and even the claim of lost property, you can have a general understanding of the campus community first. In addition, if you have specific questions related to your major, you can try to contact professors in your school and "chat up" alumni on LinkedIn, and many people will respond in a friendly way.