diff --git a/zh-cn/overviews/collections/Arrays.md b/zh-cn/overviews/collections/arrays.md similarity index 100% rename from zh-cn/overviews/collections/Arrays.md rename to zh-cn/overviews/collections/arrays.md diff --git a/zh-cn/overviews/collections/Equality.md b/zh-cn/overviews/collections/equality.md similarity index 100% rename from zh-cn/overviews/collections/Equality.md rename to zh-cn/overviews/collections/equality.md diff --git a/zh-cn/overviews/collections/Introduction.md b/zh-cn/overviews/collections/introduction.md similarity index 100% rename from zh-cn/overviews/collections/Introduction.md rename to zh-cn/overviews/collections/introduction.md diff --git a/zh-cn/overviews/collections/Iterators.md b/zh-cn/overviews/collections/iterators.md similarity index 100% rename from zh-cn/overviews/collections/Iterators.md rename to zh-cn/overviews/collections/iterators.md diff --git a/zh-cn/overviews/collections/Maps.md b/zh-cn/overviews/collections/maps.md similarity index 100% rename from zh-cn/overviews/collections/Maps.md rename to zh-cn/overviews/collections/maps.md diff --git a/zh-cn/overviews/collections/Sets.md b/zh-cn/overviews/collections/sets.md similarity index 100% rename from zh-cn/overviews/collections/Sets.md rename to zh-cn/overviews/collections/sets.md diff --git a/zh-cn/overviews/collections/Strings.md b/zh-cn/overviews/collections/strings.md similarity index 100% rename from zh-cn/overviews/collections/Strings.md rename to zh-cn/overviews/collections/strings.md diff --git a/zh-cn/overviews/collections/Views.md b/zh-cn/overviews/collections/views.md similarity index 100% rename from zh-cn/overviews/collections/Views.md rename to zh-cn/overviews/collections/views.md diff --git a/zh-cn/overviews/parallel-collections/Overview.md b/zh-cn/overviews/parallel-collections/overview.md similarity index 100% rename from zh-cn/overviews/parallel-collections/Overview.md rename to zh-cn/overviews/parallel-collections/overview.md