Douding Com: You'd better find something academic on the diced beans. Com, because time is long, things are relatively complete.

Baidu Library: It is a public platform with a lot of content, but after all, it has not been open for a long time, and there are still some things that can't be found. But relatively speaking, Baidu has a large user base, so as long as registered users can download a lot of information, and many data downloads are worthless. Therefore, in the long run, it is very promising.

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If you download ordinary things, Baidu Library is good and professional. Douding.com is a good choice.