There are also some professional things that can't be found in Baidu Library!
If you want to find some professional documents and articles, you shouldn't go to Baidu. You should look for similar databases, such as Wanfang, VIP, book show and so on. Things here can't be found at all on Baidu!
But the database also has its limitations. For example, if you find a xx tutorial, you can't find it in the database at all. Which library has good resources depends on your private use. Choose the right library and database!
I hope I can help you adopt it. Oh, thank you!