The addition of the central and Western sections of the present Old Library began in March 1930.

[citation needed] During the Anti-Japanese War period, Tsinghua University was forced to move to the South.

In 1946, after the victory of the Anti-Japanese War, Tsinghua University returned to the original campus in Beijing, but the Library was no longer there as it was.

Since Tsinghua University's liberation on 15 December 1948, the Library embarked on a healthy development path again.

Fortunately, 300,000 rare ancient books, oracle bone inscriptions, bronzes and other precious cultural relics were preserved under the instruction of then-president, Jiang Nanxiang.

To support the education and research needs of the restructured university, the library acquisition policy focused on engineering materials and Marxism–Leninism works and modern literature.

[citation needed] During the Cultural Revolution, the budget of the library was deeply cut.

After the Third Plenary Session of the 11th Central Committee of the CPC in 1978, the education sector began to develop rapidly.

It was collaboratively designed by the famous Swiss architect, Mario Botta, and the China Academy of Architectural Sciences.

[5] The new Law Library in Leo KoGuan Building opened for trial run on 29 May 2019.

After the completion of the second phase, the area of the library increased to 7,700 square meters, with a capacity for 300,000 books and more than 700 user seats.

[3] In 2001, the Old Library, as a part of the "Early Buildings of Tsinghua University", was designated as a national key cultural relics protection unit, serial number 5-476.

The layout of the library, its courtyard and surrounding areas form a solemn, elegant, beautiful and peaceful academic environment full of cultural atmosphere.

[4] The new Law Library in Leo KoGuan Building covers a construction area of 10,000 square meters.

It houses an estimated collection of one million books and 651 user seats, and is equipped with self-check machine, individual study rooms, and other facilities.

In addition to the printed books in Chinese and foreign languages, there are also other document resources available to readers: The library has advanced network and IT infrastructure to support IPv6 and Gigabit access.

[1] The library provides a variety of self-service equipment, such as check-out machines and printing.

The library offers a variety of information literacy education courses, various electronic resources and other types of training for faculty and students.

[3] The subject librarian program keeps close contact with the departments and colleges and provides services proactively based on the needs in teaching and research.