SPECIALTOPIC:110th anniversary of NLC The experience andtransformation of Chinese librarianship 005 RAO Quan From gatekeeper togateway to gate-opener: A new role for the global library field 022 Gerald LEITNER The development oflibrary science in China in an international perspective 028 CHENG Huanwen& Liu Jiaqin Librarytransformation in the post-knowledge service era 040 KE Ping & ZouJinhui Eight majorproblems in the development of the librarianship in China 058 YE Jiyuan Transition: Adolescents'hybrid reading in the omnimedia era 076 LI Guihua &LIU Jing Exploring the userplatform preference and user interest preference of Chinese scholarlyarticles:A comparison based on usage metrics 098 CHEN Bikun, ZHOUHuixian, ZHONG Zhouyan & WANG Yuefen Citing behavior ofChinese books based on citation content 117 ZHANG Chengzhi, LIZhuo, ZHAO Mengyuan, LIU Jiahao & ZHOU Qingqing Extended English abstracts of articlespublished in the Chinese edition of Journal of Library Science in China,Vol. 45,2019 136