diff --git a/app/pdf/order_item_pdf.rb b/app/pdf/order_item_pdf.rb
index fabc8d11..58682d8a 100755
--- a/app/pdf/order_item_pdf.rb
+++ b/app/pdf/order_item_pdf.rb
@@ -110,7 +110,7 @@ class OrderItemPdf < Prawn::Document
     end
 
     if alt_name
-        if !(order_item.alt_name).empty?
+        if order_item.alt_name
             move_down 4
             font("public/fonts/NotoSansCJKtc-Regular.ttf") do
                 text "(#{order_item.alt_name})", :size => self.item_font_size,:align => :left, :inline_format => true
diff --git a/app/pdf/order_item_slim_pdf.rb b/app/pdf/order_item_slim_pdf.rb
index 146b585f..05add2c9 100755
--- a/app/pdf/order_item_slim_pdf.rb
+++ b/app/pdf/order_item_slim_pdf.rb
@@ -110,7 +110,7 @@ class OrderItemSlimPdf < Prawn::Document
     end
 
     # if alt_name
-    #     if !(order_item_slim.alt_name).empty?
+    #     if order_item_slim.alt_name
     #         move_down 1
     #         font("public/fonts/NotoSansCJKtc-Regular.ttf") do
     #             text "(#{order_item_slim.alt_name})", :size => self.item_font_size,:align => :left, :inline_format => true
diff --git a/app/pdf/order_set_item_pdf.rb b/app/pdf/order_set_item_pdf.rb
index 9aac0d0e..ce06081f 100755
--- a/app/pdf/order_set_item_pdf.rb
+++ b/app/pdf/order_set_item_pdf.rb
@@ -109,7 +109,7 @@ class OrderSetItemPdf < Prawn::Document
     end
 
     if alt_name
-        if !(order_set_item.alt_name).empty?
+        if order_set_item.alt_name
             move_down 4
             font("public/fonts/NotoSansCJKtc-Regular.ttf") do
                 text "(#{order_set_item.alt_name})", :size => self.item_font_size,:align => :left, :inline_format => true