diff --git a/app/models/questionnaire_survey.rb b/app/models/questionnaire_survey.rb
index 7f0ccf5..e2c0024 100644
--- a/app/models/questionnaire_survey.rb
+++ b/app/models/questionnaire_survey.rb
@@ -185,9 +185,14 @@ class QuestionnaireSurvey
     survey_answers = survey_answers.to_a
     chart_data = {}
     answers =(0...survey_answers.count).map{{}}
+    agree_trans = I18n.t("survey.true")
+    disagree_trans = I18n.t("survey.false")
     survey_answers.each_with_index do |answer,i|
       answers[i]["name"] = User.find(answer.user).member_name rescue ""
-      answers[i]["agree"] = I18n.t("self.#{answer.consent_used}")
+      answers[i]["time"] = answer.created_at.strftime((I18n.locale == :zh_tw ? "%Y/%m/%d %H:%M" : "%h %d, %Y  -  %H:%M"))
+      if self.enable_consent_feature
+        answers[i]["agree"] = (answer.consent_used ? agree_trans : disagree_trans)
+      end
     end
     SurveysHelper.set_locale(I18n.locale)
     survey_questions.each do |question|
diff --git a/app/models/survey_answer.rb b/app/models/survey_answer.rb
index 25b7f6e..329e137 100644
--- a/app/models/survey_answer.rb
+++ b/app/models/survey_answer.rb
@@ -21,7 +21,7 @@ class SurveyAnswer
       if answer_group.nil?
         answer_group = SurveyAnswerGroup.new(info)
       end
-      answer_group.last_modified = self.updated_at
+      answer_group.last_modified = self.created_at
       answer_group.survey_answer_ids << self.id
       answer_group.save
     end
@@ -29,7 +29,7 @@ class SurveyAnswer
   after_save do
     answer_group = SurveyAnswerGroup.where(:questionnaire_survey_id=>self.questionnaire_survey.id,:user=>user).first
     if answer_group
-      answer_group.last_modified = self.updated_at
+      answer_group.last_modified = self.created_at
       answer_group.save
     end
   end
diff --git a/app/views/admin/surveys/answer_sets.html.erb b/app/views/admin/surveys/answer_sets.html.erb
index 19a57b6..f34dd20 100644
--- a/app/views/admin/surveys/answer_sets.html.erb
+++ b/app/views/admin/surveys/answer_sets.html.erb
@@ -54,6 +54,7 @@
 </div>
 <% end %>
 <% if type == "result_chart" %>
+<% @survey_answers.options = {} %>
 <div style="clear: both;"></div>
 <style type="text/css">
   #tooltip{
@@ -94,7 +95,7 @@
 </style>
 <script>
   <% if @survey.need_assign_color %>
-    <% data = @survey_answers.order_by(:updated_at=>1).group_by(&:color).map{|k,sas| [k, sas.map{|sa| [sa.updated_at.to_i * 1000 , sa.scored_points ]} ] }.to_h %>
+    <% data = @survey_answers.order_by(:created_at=>1).group_by(&:color).map{|k,sas| [k, sas.map{|sa| [sa.created_at.to_i * 1000 , sa.scored_points ]} ] }.to_h %>
     var min_time = <%= data.map{|k,d| d[0][0] rescue 0}.min %>;
     var max_time = <%= data.map{|k,d| d[-1][0] rescue 0}.max %>;
     <% all_data = data.values.flatten(1) %>
@@ -102,7 +103,7 @@
     var min_y = <%= y_data.min.to_i %>;
     var max_y = <%= y_data.max.to_i %>;
   <% else %>
-    <% data = @survey_answers.order_by(:updated_at=>1).map{|sa| [sa.updated_at.to_i * 1000 , sa.scored_points ]} %>
+    <% data = @survey_answers.order_by(:created_at=>1).map{|sa| [sa.created_at.to_i * 1000 , sa.scored_points ]} %>
     var min_time = <%= data[0][0] rescue 0 %>;
     var max_time = <%= data[-1][0] rescue 0 %>;
     var min_y = <%= data.map{|a| a[1]}.min.to_i %>;
@@ -224,7 +225,7 @@
       var x = item.datapoint[0].toFixed(2),
           y = item.datapoint[1].toFixed(0);
       var date = new moment(Math.round(x));
-      var tp =  "(" + date.format("yyyy/MM/DD hh:mm") + ")"
+      var tp =  "(" + date.format("yyyy/MM/DD HH:mm") + ")"
       $("#tooltip").html("<%=t("survey.type.0")%>: "+y+"<br>"+tp);
       var left = 0;
       var content_width = tp.length*8.2
@@ -261,7 +262,7 @@
   	<% else %>
   		<td>NA</td>
   	<% end %>
-  	<td><%= (@is_answer_list ? sa.updated_at : sa.last_modified).strftime("%h %d, %Y  -  %H:%M") rescue nil %></td>
+  	<td><%= (@is_answer_list ? sa.created_at : sa.last_modified).strftime((I18n.locale == :zh_tw ? "%Y/%m/%d %H:%M" : "%h %d, %Y  -  %H:%M")) rescue nil %></td>
   	<td>
       <% if @answer_repeat && !@is_answer_list %>
         <a class="btn btn-primary" href="/admin/surveys/<%= sa.id.to_s %>/answer_list"><%= t("survey.view") %>(<%=sa.survey_answer_ids.count%>)</a>
diff --git a/app/views/survey_export/export.xlsx.axlsx b/app/views/survey_export/export.xlsx.axlsx
index b89ded6..4831999 100644
--- a/app/views/survey_export/export.xlsx.axlsx
+++ b/app/views/survey_export/export.xlsx.axlsx
@@ -4,8 +4,12 @@ wb = xlsx_package.workbook
 title = survey.title
 title = "WorkSheet1" if title.blank?
 wb.add_worksheet(name: title) do |sheet|
-  row = [I18n.t("survey.taken_by"), I18n.t("survey.consent_to_be_used_for_research")]
+  row = [I18n.t("survey.taken_by"), I18n.t("survey.taken_date")]
   row2 = ["", ""]
+  if survey.enable_consent_feature
+    row << survey.consent_contents
+    row2 << ""
+  end
   survey_questions.each_with_index do |question, i|
     qnum = question.title.match(/^\d+./).nil? ? "#{i+1}. " : ""
     start_col = row2.count
diff --git a/app/views/surveys/my_record.html.erb b/app/views/surveys/my_record.html.erb
index 3c8f395..83ce5e9 100644
--- a/app/views/surveys/my_record.html.erb
+++ b/app/views/surveys/my_record.html.erb
@@ -77,7 +77,7 @@
 </style>
 <script>
   <% if @survey.need_assign_color %>
-    <% data = @survey_answers.order_by(:updated_at=>1).group_by(&:color).map{|k,sas| [k, sas.map{|sa| [sa.updated_at.to_i * 1000 , sa.scored_points ]} ] }.to_h %>
+    <% data = @survey_answers.order_by(:created_at=>1).group_by(&:color).map{|k,sas| [k, sas.map{|sa| [sa.created_at.to_i * 1000 , sa.scored_points ]} ] }.to_h %>
     var min_time = <%= data.map{|k,d| d[0][0] rescue 0}.min %>;
     var max_time = <%= data.map{|k,d| d[-1][0] rescue 0}.max %>;
     <% all_data = data.values.flatten(1) %>
@@ -85,7 +85,7 @@
     var min_y = <%= y_data.min.to_i %>;
     var max_y = <%= y_data.max.to_i %>;
   <% else %>
-    <% data = @survey_answers.order_by(:updated_at=>1).map{|sa| [sa.updated_at.to_i * 1000 , sa.scored_points ]} %>
+    <% data = @survey_answers.order_by(:created_at=>1).map{|sa| [sa.created_at.to_i * 1000 , sa.scored_points ]} %>
     var min_time = <%= data[0][0] rescue 0 %>;
     var max_time = <%= data[-1][0] rescue 0 %>;
     var min_y = <%= data.map{|a| a[1]}.min.to_i %>;
@@ -207,7 +207,7 @@
       var x = item.datapoint[0].toFixed(2),
           y = item.datapoint[1].toFixed(0);
       var date = new moment(Math.round(x));
-      var tp =  "(" + date.format("yyyy/MM/DD hh:mm") + ")"
+      var tp =  "(" + date.format("yyyy/MM/DD HH:mm") + ")"
       $("#tooltip").html("<%=t("survey.type.0")%>: "+y+"<br>"+tp);
       var left = 0;
       var content_width = tp.length*8.2
@@ -245,7 +245,7 @@
   	<% else %>
   		<td>NA</td>
   	<% end %>
-  	<td><%= (@is_answer_list ? sa.updated_at : sa.last_modified).strftime("%h %d, %Y  -  %H:%M") rescue nil %></td>
+  	<td><%= (@is_answer_list ? sa.created_at : sa.last_modified).strftime((I18n.locale == :zh_tw ? "%Y/%m/%d %H:%M" : "%h %d, %Y  -  %H:%M")) rescue nil %></td>
   	<td>
       <% if @answer_repeat && !@is_answer_list %>
         <a class="btn btn-primary" href="/admin/surveys/<%= sa.id.to_s %>/answer_list" title="<%= t("survey.view") %>"><%= t("survey.view") %>(<%=sa.survey_answer_ids.count%>)</a>
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index 0daf01f..e4169a1 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -4,8 +4,8 @@ zh_tw:
     survey: 問卷調查
 
   survey:
-    'true': 是
-    'false': 否
+    'true': 已勾選
+    'false': 未勾選
     consent_to_be_used_for_research: "同意填答結果被用於研究"
     agree: 同意
     consent_contents: '"同意書"內容'