To cite package ‘hanyupinyin’ in publications use:

  Cui H (2026). _hanyupinyin: Convert Chinese Characters into Hanyu
  Pinyin_. R package version 0.1.3,
  <https://github.com/cuihr17/hanyupinyin>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hanyupinyin: Convert Chinese Characters into Hanyu Pinyin},
    author = {Haoran Cui},
    year = {2026},
    note = {R package version 0.1.3},
    url = {https://github.com/cuihr17/hanyupinyin},
  }