diff --git a/src/Co.php b/src/Co.php
index <HASH>..<HASH> 100644
--- a/src/Co.php
+++ b/src/Co.php
@@ -8,7 +8,6 @@ use Swoole\Coroutine;
 /**
  * Class Co
  * @since   2.0
- * @package Swoft
  */
 class Co
 {
@@ -59,11 +58,11 @@ class Co
     {
         $tid = self::tid();
 
-        // return coroutine ID for created.
+        // Return coroutine ID on created.
         return \go(function () use ($callable, $tid) {
             try {
                 $id = Coroutine::getCid();
-
+                // Storage fd
                 self::$mapping[$id] = $tid;
                 PhpHelper::call($callable);
             } catch (\Throwable $e) {
update some logic for ws server