http://www.moe.gov.cn/jyb_xwfb/gzdt_gzdt/s5987/202103/W020210329527301787356.pdf
https://github.com/krmanik/cedict-json
Pleco
MIT License
https://plecoforums.com/threads/hsk-3-0-flashcards.6706/
https://www.plecoforums.com/threads/word-frequency-list-based-on-a-15-billion-character-corpus-bcc-blcu-chinese-corpus.5859/
CC BY-SA 4.0
https://github.com/chrplr/openlexicon/blob/master/datasets-info/SUBTLEX-CH/README-subtlex-ch.md
Mani
MIT License
https://github.com/krmanik/Anki-Chinese-Vocabulary-Generator
Mani
CC BY-SA 4.0