diff --git a/mmd/check.php b/mmd/check.php
index 1367091..eca3c81 100644
--- a/mmd/check.php
+++ b/mmd/check.php
@@ -1,6 +1,6 @@
 <?php
 
-        $connection = new Mongo("mongodb://admin:supperadmin@120.26.93.115:10000");
+        $connection = new Mongo("mongodb://nicai:suppernicai@120.26.93.115:10000");
 
         $db = $connection -> HCTF;
 	      $collection = $db -> login;
diff --git a/mmd/readme b/mmd/readme
new file mode 100644
index 0000000..65e71c8
--- /dev/null
+++ b/mmd/readme
@@ -0,0 +1,2 @@
+就是一道mongodb的题
+看看源码你就懂了