Are you a medical student? Generally speaking, the VIP network is good. Chinese words: systems biomedicine Literature Database Web Edition Wanfang Digital Journal Traditional Chinese Medicine Database Retrieval System China Journal Full-text Database (Century Journal) Journal of Chinese Medical Association. Foreign languages: Springer Link System, EBSHOT (ASP+BSP), MD Consult Clinical Medical Information Service System, EMBASE.com Database, WSN World Technology, lippincott Williams &; Wilkins(LWW), BMJ Journal Collection, Oxford University Medical Electronic Full-text Database (OUP), Proquest Health &; Physical examination is completed. General search documents are on these websites. Vip is the best. I usually work for Vip websites.