To cite package ‘ggmapcn’ in publications use:

  Ren L (2025). _ggmapcn: Customizable China Map Visualizations_. R
  package version 0.1.2, <https://CRAN.R-project.org/package=ggmapcn>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ggmapcn: Customizable China Map Visualizations},
    author = {Liang Ren},
    year = {2025},
    note = {R package version 0.1.2},
    url = {https://CRAN.R-project.org/package=ggmapcn},
  }