diff --git a/images/README.md b/images/README.md
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+++ b/images/README.md
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+# images
+
+#### 介绍
+
+Un-executable data blobs such as kernel images and disk images for VM could
+be found in this dir.
diff --git a/meta/README.md b/meta/README.md
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index 0000000000000000000000000000000000000000..c56ce0bd2e980f1f2109276c027ca8fb98af604f
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+++ b/meta/README.md
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+# meta
+
+#### 介绍
+
+ideas, design, draft, issues .. all kinds of un-catalogged can live in this
+dir for a while.
diff --git a/tools/README.md b/tools/README.md
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index 0000000000000000000000000000000000000000..c7a275b8646ef4f07899a0f28e02ef8027386880
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+++ b/tools/README.md
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+# tools
+
+#### 介绍
+
+Assume there will be certain helper scripts as helper tool for ease of dev/debug
+task around dysche. Then put it under this directory.