diff --git a/demo/ztree b/demo/ztree
new file mode 100644
index 0000000000000000000000000000000000000000..f8c2a5a9b25f4b410a25d26fe6c4a5ee23486b7c
--- /dev/null
+++ b/demo/ztree
@@ -0,0 +1 @@
+ztree
\ No newline at end of file