What can I use to look up common words and allusions in ancient books?

The following dictionaries can be used to look up common words and allusions in ancient books:

Youdao online dictionary

origin of a word

Cihai

Encyclopedia of China related volumes

Chinese Wikipedia

Chinese Wikipedia resources version 20 16

Dictionary of the Origin of Geographical Names in China

China dictionary of places of interest.

China Dictionary of Modern History

China Dictionary of Ancient History

China Dictionary of Cultural History

China Dictionary of Poetry and Allusions

China Cihai

China Dictionary of Literary and Historical Masterpieces

China Idiom Dictionary

Modern Chinese dictionary

Modern Chinese dictionary

Kangxi dictionary

Shuo Wen Jie Zi

These offline dictionaries are only a few tens of MB, and they are placed on mobile phones. When you find the same entry, all dictionaries are available for you to use. Very convenient and perfect. I promise you can't put it down. I'll believe that when I see it. Please take a closer look at my screen shot.