The abbreviation of the word "library". 1929 65438+ 10, the first annual meeting of China Library Association passed Du Dingyou's case of adopting new characters. Later, when the association wrote a letter to the library about "interview and circulation", it asked the local library to widely use the word "... The General Situation of China Library Association published by the association in 1933 took the promotion of the new word" Huan "as the fourth item of the first item in its career-library administrative promotion. In 1930s, the word "Huan" was widely used in library literature.