1. b-ok.cc website: a free English e-book search website https://b-ok.cc/
2. Kumo search for books: equivalent to a resource platform that integrates online e-book resources. No more wasting time in the messy information of Baidu search.
https://www.jiumodiary.com/
3. Stack Exchange: is a series of Q&A websites, each of which contains questions in different fields.
https://stackexchange.com/
4. Dimensions.ai: A search engine similar to Google Scholar and Baidu Scholar.
https://app.dimensions.ai/discover/publication
5. Library Genesis: Almost all foreign language books and papers can be searched and downloaded.
http://gen.lib.rus.ec/
VI. Learn Tutu: A standard download site for sharing learning materials on industrial engineering technology.
http://www.bzfxw.com/
Also attached are some websites related to academic writing and Latex:
1. ORCID: is the abbreviation of Open Researcher and Contributor ID, that is, the author (i.e. scientific researcher) identifier of open academic publications and academic output. ORCID is a set of 16-digit identification codes that do not incur any costs and is unique in the world. The ORCID of the scientific researcher is equivalent to the DOI of the digital object in the literature field, the ISSN of the journal, and the ID card of Chinese citizens. (Quoted from Baidu Encyclopedia)
https://orcid.org/
2.Overleaf: a concise online LaTeX editor.
https://www.overleaf.com/
3.MathType Demo: Integrate MathType with your favorite development framework, for example, directly generate the Latex statement corresponding to the formula.
http://www.wiris.com/editor/demo/en/developers#mathml-latex
4. DictALL: It is equivalent to an academic English dictionary with many example sentences.
http://www.dictall.com/zt/G/p1.htm