很多资料你需要文献资料需要付费，但是你需要，急切需要，所以我教你如何获取想要的资料。
- you need to know how to surf the internet scientifically. now I'd like to tell you how to do.
you need to download a software ,named lantern.or click this adress：https://github.com/getlantern/download
you can see this page,just download one according to you computer system.
2.install it ,and start lantern.exe ,and then
you can input the website just like https://scholar.google.com.sg/ or http://www.cnki.net/ to find what you want .
just like this:
you can see DOI in the page，it's important, copy it .
3.And then ,enter this website http://www.sci-hub.tw/ ,you can see this
input you DOI in the search bar，or Ctrl + V;
and then ,show time for you!