diff --git a/src/locales/lang/en.ts b/src/locales/lang/en.ts
index 1abdbd67..065f32af 100644
--- a/src/locales/lang/en.ts
+++ b/src/locales/lang/en.ts
@@ -387,6 +387,6 @@ const msg = {
   hierarchyNodeMetrics: "Metrics for Hierarchy Graph Node",
   hierarchyNodeDashboard: "As dashboard for Hierarchy Graph Node",
   valueMappings: "Value Mappings",
-  mappingTip: "Notice: The mapping key is a Regex string",
+  mappingTip: "Notice: The mapping key is a Regex string, for instance, ^-?(0|[1-9][0-9]*|2)(\\.0+)?$",
 };
 export default msg;
diff --git a/src/locales/lang/es.ts b/src/locales/lang/es.ts
index 7c3ee5b8..e6408ace 100644
--- a/src/locales/lang/es.ts
+++ b/src/locales/lang/es.ts
@@ -387,6 +387,6 @@ const msg = {
   hierarchyNodeMetrics: "Metrics for Hierarchy Graph Node",
   hierarchyNodeDashboard: "As dashboard for Hierarchy Graph Node",
   valueMappings: "Value Mappings",
-  mappingTip: "Notice: The mapping key is a Regex string",
+  mappingTip: "Notice: The mapping key is a Regex string, for instance, ^-?(0|[1-9][0-9]*|2)(\\.0+)?$",
 };
 export default msg;
diff --git a/src/locales/lang/zh.ts b/src/locales/lang/zh.ts
index 23825661..43b5cadb 100644
--- a/src/locales/lang/zh.ts
+++ b/src/locales/lang/zh.ts
@@ -385,6 +385,6 @@ const msg = {
   hierarchyNodeMetrics: "层次图节点的指标",
   hierarchyNodeDashboard: "作为层次图节点的dashboard",
   valueMappings: "值映射",
-  mappingTip: "注意: 映射键是一个正则表达式字符串",
+  mappingTip: "注意: 映射键是一个正则表达式字符串，比如 ^-?(0|[1-9][0-9]*|2)(\\.0+)?$",
 };
 export default msg;