diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ea1e3f1..fc6b2735 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 ## CHANGE LOG
 
+### v6.1.3
+
+2013-10-09 issues [#50](https://github.com/qiniu/php-sdk/pull/50)
+
+- 断点续上传使用mkfile
+- 修订文档
+- 消除测试用例并发问题
+
 ### v6.1.2
 
 2013-09-24 issue [#40](https://github.com/qiniu/php-sdk/pull/40)
diff --git a/docs/README.md b/docs/README.md
index 81014336..4d950e13 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -145,7 +145,7 @@ SDK源码地址：<https://github.com/qiniu/php-sdk/tags>
 ## 上传下载接口
 	
 <a name=upload></a>
-###1. 文件上传
+### 1. 文件上传
 
 为了尽可能地改善终端用户的上传体验，七牛云存储首创了客户端直传功能。一般云存储的上传流程是：
 
@@ -283,7 +283,7 @@ SDK源码地址：<https://github.com/qiniu/php-sdk/tags>
 	//$baseUrl 就是您要访问资源的地址
 	$baseUrl = Qiniu_RS_MakeBaseUrl($domain, $key);
 
-其中<domain>是bucket所对应的域名。七牛云存储为每一个bucket提供一个默认域名。默认域名可以到[七牛云存储开发者平台](https://portal.qiniu.com/)中，空间设置的域名设置一节查询。用户也可以将自有的域名绑定到bucket上，通过自有域名访问七牛云存储。
+其中\<domain\>是bucket所对应的域名。七牛云存储为每一个bucket提供一个默认域名。默认域名可以到[七牛云存储开发者平台](https://portal.qiniu.com/)中，空间设置的域名设置一节查询。用户也可以将自有的域名绑定到bucket上，通过自有域名访问七牛云存储。
 
 **注意： key必须采用utf8编码，如使用非utf8编码访问七牛云存储将反馈错误**
 
diff --git a/qiniu/resumable_io.php b/qiniu/resumable_io.php
index 7e477a73..33491ad6 100644
--- a/qiniu/resumable_io.php
+++ b/qiniu/resumable_io.php
@@ -59,11 +59,13 @@ function Qiniu_Rio_Mkblock($self, $host, $reader, $size) // => ($blkputRet, $err
 	return Qiniu_Client_CallWithForm($self, $url, $body, 'application/octet-stream');
 }
 
+
 function Qiniu_Rio_Mkfile($self, $host, $key, $fsize, $extra) // => ($putRet, $err)
 {
-	$entry = $extra->Bucket . ':' . $key;
-	$url = $host . '/rs-mkfile/' . Qiniu_Encode($entry) . '/fsize/' . $fsize;
-
+	$url = $host . '/mkfile/' . $fsize;
+	if ($key !== null) {
+		$url .= '/key/' . Qiniu_Encode($key);
+	}
 	if (!empty($extra->MimeType)) {
 		$url .= '/mimeType/' . Qiniu_Encode($extra->MimeType);
 	}
@@ -74,7 +76,7 @@ function Qiniu_Rio_Mkfile($self, $host, $key, $fsize, $extra) // => ($putRet, $e
 	}
 	$body = implode(',', $ctxs);
 
-	return Qiniu_Client_CallWithForm($self, $url, $body, 'text/plain');
+	return Qiniu_Client_CallWithForm($self, $url, $body, 'application/octet-stream');
 }
 
 // ----------------------------------------------------------
@@ -107,7 +109,6 @@ function Qiniu_Rio_Put($upToken, $key, $body, $fsize, $putExtra) // => ($putRet,
 	$self = new Qiniu_Rio_UploadClient($upToken);
 
 	$progresses = array();
-	$host = $QINIU_UP_HOST;
 	$uploaded = 0;
 	while ($uploaded < $fsize) {
 		if ($fsize < $uploaded + QINIU_RIO_BLOCK_SIZE) {
@@ -115,14 +116,14 @@ function Qiniu_Rio_Put($upToken, $key, $body, $fsize, $putExtra) // => ($putRet,
 		} else {
 			$bsize = QINIU_RIO_BLOCK_SIZE;
 		}
-		list($blkputRet, $err) = Qiniu_Rio_Mkblock($self, $host, $body, $bsize);
+		list($blkputRet, $err) = Qiniu_Rio_Mkblock($self, $QINIU_UP_HOST, $body, $bsize);
 		$host = $blkputRet['host'];
 		$uploaded += $bsize;
 		$progresses []= $blkputRet;
 	}
 
 	$putExtra->Progresses = $progresses;
-	return Qiniu_Rio_Mkfile($self, $host, $key, $fsize, $putExtra);
+	return Qiniu_Rio_Mkfile($self, $QINIU_UP_HOST, $key, $fsize, $putExtra);
 }
 
 function Qiniu_Rio_PutFile($upToken, $key, $localFile, $putExtra) // => ($putRet, $err)
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 3757bfac..014fc851 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -9,7 +9,9 @@
 
 $tid = getenv("TRAVIS_JOB_NUMBER");
 if (!empty($tid)) {
+    $pid = getmypid();
 	$tid = strstr($tid, ".");
+    $tid .= "." . $pid;
 }
 
 function initKeys() {