diff --git a/01_EJDE_spider/ejde_main.py b/01_EJDE_spider/ejde_main.py
index 6f91237..9fd79ce 100644
--- a/01_EJDE_spider/ejde_main.py
+++ b/01_EJDE_spider/ejde_main.py
@@ -12,8 +12,8 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 '''
     爬取网站：'ejde.math.txstate.edu'
 
-    Total number of papers:
-    2023/08/08 - 4300
+    Total number of papers: 2023/08/08 - 4300
+    Total Time via VPN w/119ms-delay: 441.80s
 
     ==========运行顺序==========
     1、ejde_main                    获取各年份的期刊链接 -> 抓取各篇论文的信息和作者信息 -> 调用ejde_save -> 存入小文件（json）暂存
@@ -81,6 +81,10 @@ def process_volume(url):
                             articles.extend(i for i in i_elements)
                         else:
                             print("HTML FORMAT FAILURE:", url)
+                            fail = {
+                                "website": url
+                            }
+                            failedFormatData.append(fail)
                             return
                 break
         except Exception as fetch_err:
@@ -91,12 +95,12 @@ def process_volume(url):
             else:
                 print("HTML FETCHING FAILURE:", url)
                 fail = {
-                    "website": url,
+                    "website": url
                 }
                 failedVolData.append(fail)
                 return
 
-    # Process each article using multithreading
+    # Process each article using multithreading (>20 threads would cause more error)
     volume_executor = ThreadPoolExecutor(max_workers=15)
     volume_futures = [volume_executor.submit(process_html_article, baseWeb, article) for article in articles]
 
@@ -109,7 +113,6 @@ def process_volume(url):
 
 
 def process_html_article(baseweb, article):
-    global articleNum, authorNum
     # Get article title & url
     try:
         title = article.text.strip()
@@ -118,7 +121,7 @@ def process_html_article(baseweb, article):
     except Exception as html_format_err:
         print("HTML FORMAT FAILURE:", str(html_format_err))
         fail = {
-            "article": str(article),
+            "article": str(article)
         }
         failedFormatData.append(fail)
         return
@@ -130,25 +133,15 @@ def process_html_article(baseweb, article):
         print("ARTICLE PROCESSING FAILURE:", str(article_err))
         fail = {
             "title": title,
-            "URL": article_url,
+            "URL": article_url
         }
         failedData.append(fail)
         return
 
-    # Save the data periodically based on batch size
-    if len(articleData) % batch_size == 0:
-        ejde_save.save_data(articleData, "Article_TS", str(uuid.uuid4()) + ".json")
-        articleNum += len(articleData)
-        articleData.clear()
-
-    if len(authorData) % batch_size == 0:
-        ejde_save.save_data(authorData, "Author_TS", str(uuid.uuid4()) + ".json")
-        authorNum += len(authorData)
-        authorData.clear()
-
 
 @retry(wait_fixed=5000, stop_max_attempt_number=5)
 def process_article(title, article_url):
+    global articleNum, authorNum
     headers = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) '
                              'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36'}
     article_response = requests.get(article_url, headers=headers)
@@ -241,7 +234,7 @@ def process_article(title, article_url):
                         "affiliation": [{
                             "year": volume,
                             "affiliation": affiliation,
-                            "email": email,
+                            "email": email
                         }]
                     }
                     authorData.append(author_data)
@@ -277,7 +270,7 @@ def process_article(title, article_url):
                         "affiliation": [{
                             "year": volume,
                             "affiliation": affiliation,
-                            "email": email,
+                            "email": email
                         }]
                     }
                     authorData.append(author_data)
@@ -301,11 +294,23 @@ def process_article(title, article_url):
             "journal": "Electronic Journal of Differential Equations",
             "volume": volume,
             "issue": issue,
-            "page": pp,
+            "page": pp
         }
         articleData.append(article_data)
 
+        # Save the data periodically based on batch size
+        if len(articleData) % batch_size == 0:
+            ejde_save.save_data(articleData, "Article_TS", str(uuid.uuid4()) + ".json")
+            articleNum += len(articleData)
+            articleData.clear()
 
+        if len(authorData) % batch_size == 0:
+            ejde_save.save_data(authorData, "Author_TS", str(uuid.uuid4()) + ".json")
+            authorNum += len(authorData)
+            authorData.clear()
+
+
+start_time = time.time()
 index = "https://ejde.math.txstate.edu/indexleft.html"
 response = requests.get(index)
 soup = BeautifulSoup(response.content, 'html.parser')
@@ -341,7 +346,9 @@ for future in as_completed(futures):
         print("VOLUME PROCESSING ERROR:", str(vol_err))
 
 # Retry failed processing paper
-for data in failedData:
+print("START RETRYING:", len(failedData))
+while failedData:
+    data = failedData.pop(0)
     articleTitle = data["title"]
     articleUrl = data["URL"]
     try:
@@ -350,7 +357,7 @@ for data in failedData:
         print("ARTICLE RETRYING FAILURE:", str(retry_err))
         totally_fail = {
             "title": articleTitle,
-            "URL": articleUrl,
+            "URL": articleUrl
         }
         totallyFailedData.append(totally_fail)
 
@@ -378,6 +385,9 @@ if len(failedFormatData) > 0:
     ejde_save.save_data(failedFormatData, "", "Failed_format_record.json")
     print("Total failed searching article:", len(failedFormatData))
 
+# Total running time
+print("time elapsed: {:.2f}s".format(time.time() - start_time))
+
 # Transfer to large file and delete the temporary storage files
 ejde_save.Transf()
 # ejde_save.delete()