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China hownet. HowNet is generally the first choice for finding papers. Its concept is national knowledge infrastructure, which provides the richest knowledge information resources and the most effective platform for knowledge dissemination and digital learning. The website src = "/4d086e061d950a7b184e5718d162d9f2d3c92e? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 682% 2Ch _ 305% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "/& gt； 02

Wanfang database. Wanfang Database is also a domestic professional academic database with the same reputation as China HowNet, which was developed by Wan Fang Data Company. The website src = "/7af40ad162d9f2d3486ae47cbbec8a136327c2e? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 682% 2Ch _ 305% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "/& gt； 03

Google academic search. Google Academic Search is a Google web application that can search academic articles for free, covering most published academic journals in the world. However, Google is not open to the mainland now, so it can only be opened over the wall, which is suitable for China students. Website src = "/A8EC8A13632762D0D245642CB2C08FA513DC62E? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 53 1% 2Ch _ 338% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "/& gt； 04

Vip information network VIP。 Com is a world-famous Chinese professional information service website and has become the largest comprehensive literature database in China. Website src = "/279759EE3D6D55Fb9CB DB 6B 57F224F4 A20A4DD 2e? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 682% 2Ch _ 305% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "/& gt；