Sources and licenses
Baozi is built on open data. Thank you to its authors.
Audio — the audio-cmn project (Hugo Lopez, PLIDAM/INALCO): syllables recorded by Chen Wang, words by Yue Tan (Shtooka collection). License CC BY-SA. Files are used unmodified. audio-cmn · CC BY-SA
HSK 2–9 recordings — made by Baozi with a synthetic voice and checked for tones.
Stroke order and character composition — Make Me a Hanzi (Shaunak Kishore), based on Arphic fonts under the Arphic Public License. Make Me a Hanzi · Arphic Public License
Stroke animation — Hanzi Writer (David Chanin), MIT license. Hanzi Writer · MIT
English glosses checked against CC-CEDICT, license CC BY-SA 4.0. CC-CEDICT · CC BY-SA 4.0
Chinese–Russian dictionary entries — 大БКРС · bkrs.info, the Big Chinese–Russian Dictionary. Its databases are free to use for any purpose.
Word frequency — the wordfreq Chinese list (Robyn Speer), which includes SUBTLEX-CH (Cai & Brysbaert, 2010), freely available. License CC BY-SA 4.0. wordfreq · CC BY-SA 4.0
Tools: reading characters as pinyin — pinyin-pro · MIT; simplified and traditional characters — OpenCC, opencc-js · Apache 2.0, MIT; every syllable in every tone — audio-cmn · CC BY-SA.
Card illustrations, texts and example phrases — Baozi.