diff --git a/how_to_use_md/readme.md b/how_to_use_md/readme.md
new file mode 100644
index 0000000..145a7e7
--- /dev/null
+++ b/how_to_use_md/readme.md
@@ -0,0 +1 @@
+# md 教程
\ No newline at end of file