diff --git a/src/com/fr/plugin/form/widget/core/Constants.java b/src/com/fr/plugin/form/widget/core/Constants.java
new file mode 100644
index 0000000..f4659bb
--- /dev/null
+++ b/src/com/fr/plugin/form/widget/core/Constants.java
@@ -0,0 +1,9 @@
+package com.fr.plugin.form.widget.core;
+
+/**
+ * Created by richie on 16/3/28.
+ */
+public class Constants {
+
+    public static final String PLUGIN_ID = "com.fr.solution.plugin.form.widget.rh.iframe";
+}