diff --git a/docs/en/map.md b/docs/en/map.md
index badac72..5ebf8d8 100644
--- a/docs/en/map.md
+++ b/docs/en/map.md
@@ -221,7 +221,7 @@
   export default {
     data () {
       this.chartSettings = {
-        positionJsonLink: 'https://dn-quietcoder.qbox.me/HK_geo.json',
+        positionJsonLink: 'https://unpkg.com/v-charts-custom-maps@0.2.1/hk-geo.json',
         position: 'HK',
         beforeRegisterMap (json) {
           // edit data here such as:
diff --git a/docs/map.md b/docs/map.md
index 0378654..3cebe11 100644
--- a/docs/map.md
+++ b/docs/map.md
@@ -222,7 +222,7 @@
   export default {
     data () {
       this.chartSettings = {
-        positionJsonLink: 'https://dn-quietcoder.qbox.me/HK_geo.json',
+        positionJsonLink: 'https://unpkg.com/v-charts-custom-maps@0.2.1/hk-geo.json',
         position: 'HK',
         beforeRegisterMap (json) {
           // edit data here such as:
diff --git a/examples/data/map.js b/examples/data/map.js
index db8ee00..5157758 100644
--- a/examples/data/map.js
+++ b/examples/data/map.js
@@ -81,7 +81,7 @@ export default {
       },
       settings: {
         position: 'USA',
-        positionJsonLink: 'https://dn-quietcoder.qbox.me/USA.json',
+        positionJsonLink: 'https://unpkg.com/v-charts-custom-maps@0.2.1/usa.json',
         specialAreas: {
           Alaska: {
             left: -131,
@@ -110,7 +110,7 @@ export default {
         ]
       },
       settings: {
-        positionJsonLink: 'https://dn-quietcoder.qbox.me/HK_geo.json',
+        positionJsonLink: 'https://unpkg.com/v-charts-custom-maps@0.2.1/hk-geo.json',
         position: 'HK',
         beforeRegisterMap (json) {
           // edit data here such as:
diff --git a/src/packages/map/main.js b/src/packages/map/main.js
index 26b2281..69757c9 100644
--- a/src/packages/map/main.js
+++ b/src/packages/map/main.js
@@ -6,6 +6,7 @@ function getTooltip (dataType, digit, dataStore, metrics, color, labelMap) {
   return {
     formatter (item) {
       let tpl = []
+      if (!item.name) return ''
       tpl.push(`${item.name}<br>`)
       metrics.forEach((label, index) => {
         let title = labelMap[label] != null ? labelMap[label] : label