diff --git a/apps/resm/tasks.py b/apps/resm/tasks.py
index 9a39e8a..83d2b51 100644
--- a/apps/resm/tasks.py
+++ b/apps/resm/tasks.py
@@ -158,7 +158,8 @@ def get_abstract_from_elsevier(publication_year: int = None, number_of_task:int
             elif res.status_code == 404:
                 paper.fail_reason = "elsevier_doi_not_found"
                 paper.save(update_fields=["fail_reason", "update_time"])
-    if is_elsevier_abstract_task_enabled():
+    qs_count = qs.count()
+    if is_elsevier_abstract_task_enabled() and qs_count > 0:
         current_app.send_task(
             "apps.resm.tasks.get_abstract_from_elsevier",
             kwargs={
@@ -167,7 +168,7 @@ def get_abstract_from_elsevier(publication_year: int = None, number_of_task:int
             },
             countdown=5,
         )
-    return f'{err_msg}, remaining {qs.count()} papers'
+    return f'{err_msg}, remaining {qs_count} papers'
 
 
 def is_elsevier_pdf_task_enabled():
@@ -204,7 +205,8 @@ def get_pdf_from_elsevier(number_of_task=100):
                 paper.save_file_pdf(res.content)
                 paper.has_fulltext_pdf = True
                 paper.save(update_fields=["has_fulltext_pdf", "update_time"])
-    if is_elsevier_pdf_task_enabled():
+    qs_count = qs.count()
+    if is_elsevier_pdf_task_enabled() and qs_count > 0:
         current_app.send_task(
             "apps.resm.tasks.get_pdf_from_elsevier",
             kwargs={
@@ -212,5 +214,5 @@ def get_pdf_from_elsevier(number_of_task=100):
             },
             countdown=5,
         )
-    return f'{err_msg}, remaining {qs.count()} papers'
+    return f'{err_msg}, remaining {qs_count} papers'
     
\ No newline at end of file