diff --git a/ppstructure/README_CH.md b/ppstructure/README_ch.md similarity index 100% rename from ppstructure/README_CH.md rename to ppstructure/README_ch.md diff --git a/ppstructure/layout/README_CH.md b/ppstructure/layout/README_ch.md similarity index 100% rename from ppstructure/layout/README_CH.md rename to ppstructure/layout/README_ch.md diff --git a/ppstructure/table/README_CH.md b/ppstructure/table/README_ch.md similarity index 100% rename from ppstructure/table/README_CH.md rename to ppstructure/table/README_ch.md