diff --git a/lib/tasks/sync_asia_personal_data_tasks.rake b/lib/tasks/sync_asia_personal_data_tasks.rake
index f0b03f3..73ffec3 100644
--- a/lib/tasks/sync_asia_personal_data_tasks.rake
+++ b/lib/tasks/sync_asia_personal_data_tasks.rake
@@ -42,7 +42,8 @@ module AsiaSyncPlugin
   #待確認: 指導論文(可用個人研究製作) paper_data
 
   def self.user_id(member)
-    user_id = member.email.sub(/@asia\.edu\.tw$/, '')
+    user_id_match = member.email.match(/(.*)@asia\.edu\.tw/)
+    user_id = user_id_match ? user_id_match[1] : nil
   end
   def self.localize_data(data)
     in_use_locales = Site.first.in_use_locales rescue [:en,:zh_tw]