diff --git a/src/mail/mail_reader.py b/src/mail/mail_reader.py
index 5e47d88..75eeffa 100644
--- a/src/mail/mail_reader.py
+++ b/src/mail/mail_reader.py
@@ -155,7 +155,7 @@ def read_mails():
             mail_reader = MailReader(mail.mail, mail.password)
             executor.submit(mail_reader.read_emails, mails_messages)
 
-    with ThreadPoolExecutor(max_workers=10) as executor:
+    with ThreadPoolExecutor(max_workers=20) as executor:
         for mail in mails_messages:
             match = re.search(VALIDATION_URL_REGEX, mail.body)
             if match:
diff --git a/src/utils/excel_reader.py b/src/utils/excel_reader.py
index d53cb41..debc852 100644
--- a/src/utils/excel_reader.py
+++ b/src/utils/excel_reader.py
@@ -32,9 +32,10 @@ class ExcelHelper:
         user_agent_list = []
         for user_agent_dict in user_agent_dict_list:
             user_agent_str = user_agent_dict['user_agent']
-            if 'Android' in user_agent_str:
-                if 'Mac OS' not in user_agent_str:
-                    user_agent_list.append(user_agent_dict['user_agent'])
+            if 'Mozilla' in user_agent_str:
+                if 'Android 5.1' in user_agent_str:
+                    if 'Mac OS' not in user_agent_str:
+                        user_agent_list.append(user_agent_dict['user_agent'])
         print(user_agent_list)
 
     def read_contacts(self, file_name=CONTACT_LIST_FILE) -> list:
diff --git a/src/workers/commandor_page.py b/src/workers/commandor_page.py
index 531b01c..9a5f362 100644
--- a/src/workers/commandor_page.py
+++ b/src/workers/commandor_page.py
@@ -120,24 +120,50 @@ class CommandorPage:
     def start_browser(self, proxy, pwright, device) -> Union[str, None]:
         try:
             self.browser = pwright.firefox.launch(headless=self.headless, timeout=PAGE_TIMEOUT, proxy=proxy)
-            userAgent = random.choice(params.firefox_user_agent_list)
+            # userAgent = random.choice(params.firefox_user_agent_list)
+            simulated_mobile = pwright.devices[device]
+            userAgent = simulated_mobile['user_agent']
             print("user_agent is " + userAgent)
             # context = self.browser.new_context(**simulated_mobile, locale='fr-FR')
             context = self.browser.new_context(user_agent=userAgent, locale='fr-FR')
             self.page = context.new_page()
             # hide webdriver information
             self.page.add_init_script("""() => {
-    Object.defineProperty(navigator,'webdriver',{get: () => undefined});
-    Object.defineProperty(navigator, 'platform', {
-        get: () => {
-            return "iPhone";
-        }});
-}
-            """)
+                Object.defineProperty(navigator,'webdriver',{get: () => undefined});
+                Object.defineProperty(navigator, 'platform', {
+                    get: () => {
+                        return "iPhone";
+                    }});
+            }
+                        """)
             self.page.on("load", self._on_page_loaded)
             self.page.on("response", self.handle_response)
             self.page.goto(RDV_URL, timeout=PAGE_TIMEOUT)
             return self.page.content()
+            # self.browser = pwright.webkit.launch(headless=self.headless, timeout=PAGE_TIMEOUT, proxy=proxy)
+            # self.logger.info("模拟设备: " + device)
+            # simulated_mobile = pwright.devices[device]
+            # context = self.browser.new_context(**simulated_mobile, locale='fr-FR')
+            # self.page = context.new_page()
+            # # hide webdriver information
+            # self.page.add_init_script("""() => {
+            #     Object.defineProperty(navigator,'webdriver',{get: () => undefined});
+            #     Object.defineProperty(navigator, 'platform', {
+            #         get: () => {
+            #             return "iPhone";
+            #         }});
+            # }
+            #             """)
+            # self.page.on("load", self._on_page_loaded)
+            # self.page.on("response", self.handle_response)
+            # self.page.goto(RDV_URL, timeout=PAGE_TIMEOUT)
+            # captcha_url = "geo.captcha-delivery.com/captcha"
+            # if captcha_url in self.page.content():
+            #     self.logger.info("will close browser")
+            #     self.browser.close()
+            #     return None
+            # else:
+            #     return self.page.content()
         except Exception as error:
             params.oracle_log_sender.send_error(str(error))
             traceback.print_exc(*sys.exc_info())
diff --git a/src/workers/link_validator.py b/src/workers/link_validator.py
index a948020..cb752e9 100644
--- a/src/workers/link_validator.py
+++ b/src/workers/link_validator.py
@@ -77,7 +77,13 @@ class LinkValidator:
             """)
             self.page.on("load", self._on_page_loaded)
             self.page.goto(self.link, timeout=PAGE_TIMEOUT)
-            return self.page.content()
+            captcha_url = "geo.captcha-delivery.com/captcha"
+            if captcha_url in self.page.content():
+                self.logger.info("will close browser")
+                self.browser.close()
+                return None
+            else:
+                return self.page.content()
         except Exception as error:
             params.oracle_log_sender.send_error(str(error))
             traceback.print_exc(*sys.exc_info())