What does 120 years mean?

Explain the meaning of 20. 20 is 20, so 120 is 120.

For example, in the second edition of People's Daily on May 3, 20 18, there was an article about "Peking University 120th Anniversary Celebration", which said that "Peking University has been full of youthful ideals and vitality for a hundred years, and the slogan of" Uniting and rejuvenating China "resounded through the beautiful Yanyuan Garden", referring to Peking University120.

In order to celebrate the 20th anniversary of the founding of Suzhou University/KLOC-0, publicize and tell the historical story of Suzhou University, carry forward the patriotic tradition of Suzhou University, show the cultural and artistic heritage of Suzhou University for a hundred years, show the rich achievements made by Su adults, and solidly promote the study and education of the "Four Histories" of young students, the library specially planned the "120 Glorious Rooting to Heaven" to review the historical activities of Suzhou University. So 120 can be used for the anniversary celebration.