Tongfang Knowledge Network Technology Group  Comprised of China Academic Journals Electronic Publishing House, Tongfang Knowledge Network Technology Co. Ltd. (Beijing)and Tongfang Optical Disc Co. Ltd. Dedicated to integration and dissemination of knowledge, online publishing and related technical services  China Academic Journals Electronic Publishing House Established by Tsinghua University and supervised by the Ministry of Education, China Academic Journal Electronic Publishing House is one of the first publishers authorized to online publishing by the General Administration of Press and Publications of PRC. Engaged in acquisition and digital publishing of CNKI databases resources Tongfang Knowledge Network Technology Co., Ltd. (Beijing) Engaged in sales and services of CNKI databases in global markets Tongfang Optical Disc Co., Ltd Engaged in the data processing and R&D of storage products