diff --git a/src/you_get/extractor/sina.py b/src/you_get/extractor/sina.py
index 68b73229..8ab4931c 100644
--- a/src/you_get/extractor/sina.py
+++ b/src/you_get/extractor/sina.py
@@ -4,9 +4,19 @@ __all__ = ['sina_download', 'sina_download_by_vid', 'sina_download_by_vkey']
 
 from ..common import *
 
-def video_info(id):
-    xml = get_content('http://interface.bilibili.tv/playurl?vid=%s' % id, headers=fake_headers, decoded=True)
-    #xml = get_content('http://www.tucao.cc/api/sina.php?vid=%s' % id, headers=fake_headers, decoded=True)
+from hashlib import md5
+from random import randint
+from time import time
+
+def get_k(vid, rand):
+    t = str(int('{0:b}'.format(int(time()))[:-6], 2))
+    return md5((vid + 'Z6prk18aWxP278cVAH' + t + rand).encode('utf-8')).hexdigest()[:16] + t
+
+def video_info(vid):
+    rand = "0.{0}{1}".format(randint(10000, 10000000), randint(10000, 10000000))
+    url = 'http://v.iask.com/v_play.php?vid={0}&ran={1}&p=i&k={2}'.format(vid, rand, get_k(vid, rand))
+    xml = get_content(url, headers=fake_headers, decoded=True)
+
     urls = re.findall(r'<url>(?:<!\[CDATA\[)?(.*?)(?:\]\]>)?</url>', xml)
     name = match1(xml, r'<vname>(?:<!\[CDATA\[)?(.+?)(?:\]\]>)?</vname>')
     vstr = match1(xml, r'<vstr>(?:<!\[CDATA\[)?(.+?)(?:\]\]>)?</vstr>')
@@ -16,7 +26,7 @@ def sina_download_by_vid(vid, title=None, output_dir='.', merge=True, info_only=
     """Downloads a Sina video by its unique vid.
     http://video.sina.com.cn/
     """
-    
+
     urls, name, vstr = video_info(vid)
     title = title or name
     assert title
@@ -24,7 +34,7 @@ def sina_download_by_vid(vid, title=None, output_dir='.', merge=True, info_only=
     for url in urls:
         _, _, temp = url_info(url)
         size += temp
-    
+
     print_info(site_info, title, 'flv', size)
     if not info_only:
         download_urls(urls, title, 'flv', size, output_dir = output_dir, merge = merge)
@@ -33,10 +43,10 @@ def sina_download_by_vkey(vkey, title=None, output_dir='.', merge=True, info_onl
     """Downloads a Sina video by its unique vkey.
     http://video.sina.com/
     """
-    
+
     url = 'http://video.sina.com/v/flvideo/%s_0.flv' % vkey
     type, ext, size = url_info(url)
-    
+
     print_info(site_info, title, 'flv', size)
     if not info_only:
         download_urls([url], title, 'flv', size, output_dir = output_dir, merge = merge)
@@ -44,7 +54,7 @@ def sina_download_by_vkey(vkey, title=None, output_dir='.', merge=True, info_onl
 def sina_download(url, output_dir='.', merge=True, info_only=False):
     """Downloads Sina videos by URL.
     """
-    
+
     vid = match1(url, r'vid=(\d+)')
     if vid is None:
         video_page = get_content(url)
@@ -52,7 +62,7 @@ def sina_download(url, output_dir='.', merge=True, info_only=False):
         if hd_vid == '0':
             vids = match1(video_page, r'[^\w]vid\s*:\s*\'([^\']+)\'').split('|')
             vid = vids[-1]
-    
+
     if vid:
         title = match1(video_page, r'title\s*:\s*\'([^\']+)\'')
         sina_download_by_vid(vid, title=title, output_dir=output_dir, merge=merge, info_only=info_only)