diff --git a/wxwork_finance_sdk.php b/wxwork_finance_sdk.php
index 2cb9ec5..dc12927 100644
--- a/wxwork_finance_sdk.php
+++ b/wxwork_finance_sdk.php
@@ -17,11 +17,10 @@ $chats = json_decode($obj->getChatData(0, 100), true);
 foreach ($chats['chatdata'] as $val) {
     $decryptRandKey = null;
     openssl_private_decrypt(base64_decode($val['encrypt_random_key']), $decryptRandKey, $privateKey, OPENSSL_PKCS1_PADDING);
-    $j = json_decode($obj->decryptData($decryptRandKey, $val['encrypt_chat_msg']));
-    var_dump($j);exit();
+    $obj->downloadMedia($sdkFileId, "/tmp/download");
 }
 
 
 }catch(\WxworkFinanceSdkException $e) {
     var_dump($e->getMessage(), $e->getCode());
-}
\ No newline at end of file
+}