diff --git a/AMESCoreStudio.Web/Views/PTD/PTD001A.cshtml b/AMESCoreStudio.Web/Views/PTD/PTD001A.cshtml
index cf9b36b7..c359a770 100644
--- a/AMESCoreStudio.Web/Views/PTD/PTD001A.cshtml
+++ b/AMESCoreStudio.Web/Views/PTD/PTD001A.cshtml
@@ -74,7 +74,7 @@
         var table = document.getElementById(tableID);
         var excelContent = table.innerHTML;
         var excelFile = "<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>";
-        excelFile += "<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
+        excelFile += "<head><meta charset='utf-8'><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
         excelFile += "<body><table>";
         excelFile += excelContent;
         excelFile += "</table></body>";
diff --git a/AMESCoreStudio.Web/Views/PTD/PTD003.cshtml b/AMESCoreStudio.Web/Views/PTD/PTD003.cshtml
index 682df9c6..1844bb3b 100644
--- a/AMESCoreStudio.Web/Views/PTD/PTD003.cshtml
+++ b/AMESCoreStudio.Web/Views/PTD/PTD003.cshtml
@@ -179,7 +179,7 @@
             var table = document.getElementById(tableID);
             var excelContent = table.innerHTML;
             var excelFile = "<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>";
-            excelFile += "<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
+            excelFile += "<head><meta charset='utf-8'><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
             excelFile += "<body><table>";
             excelFile += excelContent;
             excelFile += "</table></body>";
diff --git a/AMESCoreStudio.Web/Views/QRS/QRS015A.cshtml b/AMESCoreStudio.Web/Views/QRS/QRS015A.cshtml
index be7343be..d48743ef 100644
--- a/AMESCoreStudio.Web/Views/QRS/QRS015A.cshtml
+++ b/AMESCoreStudio.Web/Views/QRS/QRS015A.cshtml
@@ -60,7 +60,7 @@
             var table = document.getElementById(tableID);
             var excelContent = table.innerHTML;
             var excelFile = "<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>";
-            excelFile += "<head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
+            excelFile += "<head><meta charset='utf-8'><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>";
             excelFile += "<body><table>";
             excelFile += excelContent;
             excelFile += "</table></body>";
diff --git a/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/es-modules/modules/export-data.src.js b/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/es-modules/modules/export-data.src.js
index 72c7042f..d4e0b5a8 100644
--- a/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/es-modules/modules/export-data.src.js
+++ b/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/es-modules/modules/export-data.src.js
@@ -833,7 +833,7 @@ Highcharts.Chart.prototype.downloadXLS = function () {
         template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" ' +
             'xmlns:x="urn:schemas-microsoft-com:office:excel" ' +
             'xmlns="http://www.w3.org/TR/REC-html40">' +
-            '<head><!--[if gte mso 9]><xml><x:ExcelWorkbook>' +
+            '<head><meta charset="utf-8"><!--[if gte mso 9]><xml><x:ExcelWorkbook>' +
             '<x:ExcelWorksheets><x:ExcelWorksheet>' +
             '<x:Name>Ark1</x:Name>' +
             '<x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions>' +
diff --git a/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/modules/export-data.src.js b/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/modules/export-data.src.js
index 45d9c130..710d4e3a 100644
--- a/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/modules/export-data.src.js
+++ b/AMESCoreStudio.Web/wwwroot/Highcharts-7.1.2/modules/export-data.src.js
@@ -1086,7 +1086,7 @@
                 template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" ' +
                     'xmlns:x="urn:schemas-microsoft-com:office:excel" ' +
                     'xmlns="http://www.w3.org/TR/REC-html40">' +
-                    '<head><!--[if gte mso 9]><xml><x:ExcelWorkbook>' +
+                    '<head><meta charset="utf-8"><!--[if gte mso 9]><xml><x:ExcelWorkbook>' +
                     '<x:ExcelWorksheets><x:ExcelWorksheet>' +
                     '<x:Name>Ark1</x:Name>' +
                     '<x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions>' +
