diff --git a/README.md b/README.md
index fc7b69c..c8729b1 100644
--- a/README.md
+++ b/README.md
@@ -14,9 +14,10 @@ Server mode is faster than client mode, but server mode is tradeoff other subtas
 
 ## Compatibility
 
-Redmine 3.3 or 3.4 stable
+Redmine 3.2 or 3.3 or 3.4 stable
 
 Tested on:
+* 3.2.9
 * 3.3.6
 * 3.4.4
 
diff --git a/app/views/issues/_subtask_list_accordion_partial.html.erb b/app/views/issues/_subtask_list_accordion_partial.html.erb
index da5cb44..419a257 100644
--- a/app/views/issues/_subtask_list_accordion_partial.html.erb
+++ b/app/views/issues/_subtask_list_accordion_partial.html.erb
@@ -1,6 +1,6 @@
 <% if has_grandson_issues?(@issue) %>
   <%= content_for :header_tags do
-    stylesheet_link_tag("subtask_list_accordion", :plugin => "redmine_subtask_list_accordion") +
+    stylesheet_link_tag("subtask_list_accordion" + (subtask_list_accordion_tree_render_32? ? "_under32" : ""), :plugin => "redmine_subtask_list_accordion") +
     javascript_include_tag("subtask_list_accordion" + (subtask_tree_client_processing? ? "_client" : ""), :plugin => "redmine_subtask_list_accordion")
   end %>
   <div class="accordion_control contextual">
diff --git a/assets/stylesheets/subtask_list_accordion_under32.css b/assets/stylesheets/subtask_list_accordion_under32.css
new file mode 100644
index 0000000..f5759a7
--- /dev/null
+++ b/assets/stylesheets/subtask_list_accordion_under32.css
@@ -0,0 +1,63 @@
+#issue_tree > p {
+  margin-bottom: 5px;
+}
+
+.contextual.accordion_control {
+  float: left;
+  margin-bottom: 5px;
+  padding: 2px 7px 2px 2px;
+}
+
+.accordion_control a {
+  background-position: 0 50%;
+  background-repeat: no-repeat;
+  padding-bottom: 3px;
+  padding-left: 20px;
+  padding-top: 2px;
+}
+
+.accordion_control a.subtask_all_expand {
+  background-image: url(../../../images/arrow_expanded.png);
+}
+
+.accordion_control a.subtask_all_collapse {
+  background-image: url(../../../images/arrow_collapsed.png);
+}
+
+tr.issue.idnt td.subject a {
+  background: none;
+  padding-left: 0px;
+}
+
+tr.issue:not(.idnt):not(.haschild) td.subject a {
+  margin-left: 16px;
+}
+
+tr.issue.idnt:not(.haschild) td.subject a {
+  margin-left: 32px;
+}
+
+tr.issue.haschild > td.subject > span.treearrow {
+  cursor: pointer;
+}
+
+tr.issue.haschild:not(.idnt) > td.subject > span.treearrow {
+  padding-left: 16px;
+}
+
+tr.issue.haschild.idnt > td.subject > span.treearrow {
+  margin-left: 16px;
+  padding-left: 16px;
+}
+
+tr.issue.haschild.collapse > td.subject > span.treearrow {
+  background: url(../../../images/arrow_collapsed.png) no-repeat right bottom;
+}
+
+tr.issue.haschild.expand > td.subject > span.treearrow {
+  background: url(../../../images/arrow_expanded.png) no-repeat right bottom;
+}
+
+.icon-arrow-expanded { background-image: url(../../../images/arrow_expanded.png); }
+
+.icon-arrow-collapsed { background-image: url(../../../images/arrow_collapsed.png); }
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index c4a22f4..e36043a 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -1,9 +1,9 @@
-# English strings go here for Rails i18n
+# Simplified Chinese strings go here for Rails i18n
 zh:
   list_all_expand: "全部展开"
   list_all_collapse: "全部收拢"
   context_menu_expand: "展开当前树形结构"
   context_menu_collapse: "收拢当前树形结构"
   context_menu_all_expand_next: "下一级全部展开"
-  field_subtasks_default_expand_limit_upper: "Upper limit of child issues to tree expanding from the first time"
-  label_enable_server_scripting_mode: "Enable server processing mode (Has many subtasks tree display more than faster, but tradeoff other subtask's plugin. for exsample 'subtask_list_columns' plugin)"
+  field_subtasks_default_expand_limit_upper: "子任务树中的问题数量上限（初次加载）"
+  label_enable_server_scripting_mode: "启用服务器处理模式（若存在多级树结构，启用该选项会较快，但可能会与其他子任务相关插件有冲突，如插件 'subtask_list_columns' ） "
diff --git a/init.rb b/init.rb
index 7dd6d18..d061c17 100644
--- a/init.rb
+++ b/init.rb
@@ -17,7 +17,7 @@
   name 'Redmine Subtask List Accordion plugin'
   author 'Ryuta Tobita'
   description 'This plugin provide accordion to subtask list of issue.'
-  version '2.0.0'
+  version '2.1.0'
   url 'https://github.com/GEROMAX/redmine_subtask_list_accordion'
   author_url 'https://github.com/GEROMAX'
   settings default: { 'enable_server_scripting_mode' => true }, :partial => 'settings/subtask_list_accordion_settings'
diff --git a/lib/redmine_subtask_list_accordion/patches/issues_helper_patch.rb b/lib/redmine_subtask_list_accordion/patches/issues_helper_patch.rb
index 858ace5..3c9ef52 100644
--- a/lib/redmine_subtask_list_accordion/patches/issues_helper_patch.rb
+++ b/lib/redmine_subtask_list_accordion/patches/issues_helper_patch.rb
@@ -22,28 +22,48 @@ def switch_render_descendants_tree(issue)
 
       # add method to IssuesHelper
       def render_descendants_tree_accordion(issue)
-        #Compatible 3.3 and 3.4
-        s = (subtask_list_accordion_tree_render_33? ? '<form>' : '')
-        s << '<table class="list issues odd-even">'
         trIdx = 0
-        issue_list(issue.descendants.visible.preload(:status, :priority, :tracker, :assigned_to).sort_by(&:lft)) do |child, level|
-          arrow = (child.descendants.visible.count > 0 ? content_tag('span', '', :class => 'treearrow') : ''.html_safe)
-          css = "issue issue-#{child.id} hascontextmenu #{child.css_classes}"
-          css << " haschild" if child.children?
-          css << (expand_tree_at_first?(issue) ? " expand" : " collapse")
-          css << " idnt idnt-#{level}" if level > 0
-          hide_or_show = 'display: none;' unless level <= 0 || expand_tree_at_first?(issue)
-          s << content_tag('tr',
-                 content_tag('td', check_box_tag("ids[]", child.id, false, :id => nil), :class => 'checkbox') +
-                 content_tag('td', arrow + link_to_issue(child, :project => (issue.project_id != child.project_id)), :class => 'subject', :style => 'width: 50%') +
-                 content_tag('td', h(child.status), :class => 'status') +
-                 content_tag('td', link_to_user(child.assigned_to), :class => 'assigned_to') +
-                 content_tag('td', child.disabled_core_fields.include?('done_ratio') ? '' : progress_bar(child.done_ratio), :class=> 'done_ratio'),
-                 :class => css, :cs => (trIdx+=1).to_s, :ce => (trIdx + child.descendants.visible.count - 1).to_s, :rank => level.to_s, :style => hide_or_show)
+        #switch under 3.2 or higher
+        if subtask_list_accordion_tree_render_32?
+          s = '<form><table class="list issues">'
+          issue_list(issue.descendants.visible.preload(:status, :priority, :tracker).sort_by(&:lft)) do |child, level|
+            arrow = (child.descendants.visible.count > 0 ? content_tag('span', '', :class => 'treearrow') : ''.html_safe)
+            css = "issue issue-#{child.id} hascontextmenu"
+            css << " haschild" if child.children?
+            css << (expand_tree_at_first?(issue) ? " expand" : " collapse")
+            css << " idnt idnt-#{level}" if level > 0
+            hide_or_show = 'display: none;' unless level <= 0 || expand_tree_at_first?(issue)
+            s << content_tag('tr',
+                  content_tag('td', check_box_tag("ids[]", child.id, false, :id => nil), :class => 'checkbox') +
+                  content_tag('td', arrow + link_to_issue(child, :project => (issue.project_id != child.project_id)), :class => 'subject', :style => 'width: 50%') +
+                  content_tag('td', h(child.status)) +
+                  content_tag('td', link_to_user(child.assigned_to)) +
+                  content_tag('td', child.disabled_core_fields.include?('done_ratio') ? '' : progress_bar(child.done_ratio)),
+                  :class => css, :cs => (trIdx+=1).to_s, :ce => (trIdx + child.descendants.visible.count - 1).to_s, :rank => level.to_s, :style => hide_or_show)
+          end
+          s << '</table></form>'
+          s.html_safe
+        else
+          s = '<table class="list issues odd-even">'
+          issue_list(issue.descendants.visible.preload(:status, :priority, :tracker, :assigned_to).sort_by(&:lft)) do |child, level|
+            arrow = (child.descendants.visible.count > 0 ? content_tag('span', '', :class => 'treearrow') : ''.html_safe)
+            css = "issue issue-#{child.id} hascontextmenu #{child.css_classes}"
+            css << " haschild" if child.children?
+            css << (expand_tree_at_first?(issue) ? " expand" : " collapse")
+            css << " idnt idnt-#{level}" if level > 0
+            hide_or_show = 'display: none;' unless level <= 0 || expand_tree_at_first?(issue)
+            s << content_tag('tr',
+                  content_tag('td', check_box_tag("ids[]", child.id, false, :id => nil), :class => 'checkbox') +
+                  content_tag('td', arrow + link_to_issue(child, :project => (issue.project_id != child.project_id)), :class => 'subject', :style => 'width: 50%') +
+                  content_tag('td', h(child.status), :class => 'status') +
+                  content_tag('td', link_to_user(child.assigned_to), :class => 'assigned_to') +
+                  content_tag('td', child.disabled_core_fields.include?('done_ratio') ? '' : progress_bar(child.done_ratio), :class=> 'done_ratio'),
+                  :class => css, :cs => (trIdx+=1).to_s, :ce => (trIdx + child.descendants.visible.count - 1).to_s, :rank => level.to_s, :style => hide_or_show)
+          end
+          s << '</table>'
+          #Compatible 3.3 and 3.4
+          subtask_list_accordion_tree_render_33? ? ('<form>' + s + '</form>').html_safe : s.html_safe
         end
-        s << '</table>'
-        s << (subtask_list_accordion_tree_render_33? ? '</form>' : '')
-        s.html_safe
       end
 
       def expand_tree_at_first?(issue)
@@ -58,6 +78,11 @@ def subtask_tree_client_processing?
         return !Setting.plugin_redmine_subtask_list_accordion['enable_server_scripting_mode']
       end
 
+      def subtask_list_accordion_tree_render_32?
+        threshold = [3,3,0]
+        return (Redmine::VERSION.to_a[0, 3] <=> threshold) < 0
+      end
+
       def subtask_list_accordion_tree_render_33?
         threshold = [3,4,0]
         return (Redmine::VERSION.to_a[0, 3] <=> threshold) < 0