diff --git a/example/pie/pie_map.csv b/example/pie/pie_map.csv
new file mode 100644
index 0000000..4c9f51c
--- /dev/null
+++ b/example/pie/pie_map.csv
@@ -0,0 +1,10 @@
+50265,北京
+60555,上海
+38544,广州
+27276,深圳
+20506,西安
+26916,昆明
+17636,武汉
+977,拉萨
+10406,哈尔滨
+6695,乌鲁木齐
diff --git a/example/pie/pie_map.html b/example/pie/pie_map.html
new file mode 100644
index 0000000..f408172
--- /dev/null
+++ b/example/pie/pie_map.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8" />
+        <title>Pie Chart</title>
+        <script src="../../build/deps.js"></script>
+        <!-- chord -->
+        <script src="../../deps/seajs/sea.js"></script>
+        <script>
+            seajs.config({
+                alias: {
+                    'DataV': '/lib/datav.js',
+                    'Pie': '/lib/charts/pie.js'
+                }
+            });
+        </script>
+<style type="text/css">
+#chart {
+    border-top: 1px dashed #F00;
+    border-bottom: 1px dashed #F00;
+    padding-left: 20px;
+}
+.textArea {
+    border: 2px solid black;
+    color: black;
+    font-family: monospace;
+    height: 3in;
+    overflow: auto;
+    padding: 0.5em;
+    width: 750px;
+}
+</style>
+    </head>
+
+    <body>
+        <div id="chart"></div>
+        <script>
+            seajs.use(["Pie", "DataV"], function (Pie, DataV) {
+                // DataV.changeTheme("datav");
+                var pie = new Pie("chart", {
+                    width: 1000,
+                    tag: true
+                });
+                DataV.csv("pie_map.csv", function (source) {
+                    pie.setSource(source, {label: 1, value: 0});
+                    pie.render();
+                });
+            });
+        </script>
+        </script>
+    </body>
+
+</html>
diff --git a/lib/datav.js b/lib/datav.js
index 7845462..181c461 100644
--- a/lib/datav.js
+++ b/lib/datav.js
@@ -189,7 +189,6 @@
         return function (num) {
             var thisColor = gotColor;
             var thisColorCount = colorCount;
-
             return thisColor[num % thisolorCount];
         };
     };
@@ -254,9 +253,7 @@
      * @param {String} url JSON文件地址
      * @param {Function} callback 回调函数
      */
-    DataV.json = function (url, callback) {
-        d3.json(url, callback);
-    };
+    DataV.json = d3.json;
 
     /**
      * 请求一个CSV文件，并解析
