diff --git a/content/bits-pieces/_index.md b/content/bits-pieces/_index.md
deleted file mode 100644
index 5004b91..0000000
--- a/content/bits-pieces/_index.md
+++ /dev/null
@@ -1,9 +0,0 @@
----
-title: '随手记'
-date: 2020-12-04T23:54:37+08:00
-draft: false
----
-
-随手记，一些碎片。
-
-I always have a lot of bits and pieces in my coat pocket.
diff --git a/content/bits-pieces/pngquant.md b/content/references/pngquant.md
similarity index 72%
rename from content/bits-pieces/pngquant.md
rename to content/references/pngquant.md
index 75d7652..df8569e 100644
--- a/content/bits-pieces/pngquant.md
+++ b/content/references/pngquant.md
@@ -1,10 +1,10 @@
 ---
-title: 'pngquant'
+title: 'PNG图片批量压缩'
 date: 2020-12-14T23:54:37+08:00
 draft: false
 ---
 
-## pngquant
+使用 pngquant 命令行批量压缩 PNG 图片。
 
 pngquant 压缩当前目录下全部 PNG 文件，并且默认全覆盖已有。