diff --git a/apps/resm/tasks.py b/apps/resm/tasks.py
index f41a4e6..fb2f39b 100644
--- a/apps/resm/tasks.py
+++ b/apps/resm/tasks.py
@@ -4,9 +4,13 @@ from apps.utils.tasks import CustomTask
 from celery import shared_task
 from pyalex import Works, config
 from itertools import chain
-from apps.resm.models import Paper
+from apps.resm.models import Paper, PaperAbstract
 from apps.utils.snowflake import idWorker
 from django.core.cache import cache
+import requests
+from lxml import etree
+from django.conf import settings
+import os
 
 config.email = "caoqianming@foxmail.com"
 config.max_retries = 0
@@ -57,5 +61,86 @@ def get_paper_meta_from_openalex(publication_year:int, search_key:str):
 
 ELSEVIER_APIKEY = 'aa8868cac9e27d6153ab0a0acd7b50bf'
 @shared_task(base=CustomTask)
-def get_abstract_from_elsevier(publication_year:int):
-    pass
\ No newline at end of file
+def get_abstract_from_elsevier(publication_year: int, number_of_task:int = 100):
+    qs = Paper.objects.filter(
+        publication_year=publication_year,
+        has_abstract=False
+    ).exclude(
+        fail_reason="elsevier_doi_not_found"
+    ).order_by("publication_date")
+
+    if not qs.exists():
+        return "done"
+
+    params = {
+        "apiKey": ELSEVIER_APIKEY,
+        "httpAccept": "text/xml"
+    }
+    err_msg = ""
+    req = requests.Session()
+    for paper in qs[:number_of_task]:
+        try:
+            res = req.get(
+                f"https://api.elsevier.com/content/article/doi/{paper.doi}",
+                params=params,
+                timeout=(3, 15)
+            )
+        except requests.RequestException:
+            err_msg = "elsevier_request_error"
+            break
+
+        if res.status_code == 200:
+            xml_str = res.text
+            try:
+                root = etree.fromstring(xml_str.encode("utf-8"))
+            except etree.XMLSyntaxError:
+                paper.fail_reason = "elsevier_xml_error"
+                paper.save(update_fields=["fail_reason"])
+                continue
+
+            ns = {"dc": "http://purl.org/dc/elements/1.1/",
+            "ce": "http://www.elsevier.com/xml/common/dtd"}
+            abstract = root.xpath("//dc:description/text()", namespaces=ns)
+            if abstract:
+                PaperAbstract.objects.update_or_create(
+                    paper=paper,
+                    defaults={
+                        "abstract": abstract[0].strip(),
+                        "source": "elsevier"
+                    }
+                )
+                paper.has_abstract = True
+                paper.has_abstract_xml = True
+
+            paras = root.xpath("//ce:para", namespaces=ns)
+            has_fulltext = len(paras) > 0
+            if has_fulltext:
+                paper.has_fulltext = True
+                paper.has_fulltext_xml = True
+                
+            publication_date = paper.publication_date
+            paper_dir = os.path.join(
+                settings.BASE_DIR,
+                "media/papers",
+                str(publication_date.year),
+                str(publication_date.month),
+                str(publication_date.day)
+            )
+            os.makedirs(paper_dir, exist_ok=True)
+
+            safe_doi = paper.doi.replace("/", "_")
+            paper_file = os.path.join(paper_dir, f"{safe_doi}.xml")
+            with open(paper_file, "wb") as f:
+                f.write(xml_str.encode("utf-8"))
+
+            paper.save(update_fields=["has_abstract", "has_abstract_xml", "has_fulltext", "has_fulltext_xml", "update_time"])
+
+        elif res.status_code == 404:
+            paper.fail_reason = "elsevier_doi_not_found"
+            paper.save(update_fields=["fail_reason"])
+    
+    remaining_count = qs.count()
+    if remaining_count == 0:
+        return "done"
+    else:
+        return f'{err_msg}, remaining {remaining_count} papers'
\ No newline at end of file