diff --git a/chapter2/mysite/myapp/static/scripts/trend.js b/chapter2/mysite/myapp/static/scripts/trend.js
index 2f7018f..ae490be 100755
--- a/chapter2/mysite/myapp/static/scripts/trend.js
+++ b/chapter2/mysite/myapp/static/scripts/trend.js
@@ -361,8 +361,6 @@ $(function(){
 
    //疾病发病趋势
    var lineChart2 = echarts.init(document.getElementById('lineChart2'));
-
-   var lineChart2 = echarts.init(document.getElementById('lineChart1'));
     var lineChart2_names = [];
     var lineChart2_datas = [];
     for(var key in last_month_sell){