diff --git a/en/index.xml b/en/index.xml
index 8bf05ef..c212c53 100644
--- a/en/index.xml
+++ b/en/index.xml
@@ -97,6 +97,7 @@ Facebook:https://www.facebook.com/search/str/%s/keywords_search
 Instagram:https://www.instagram.com/explore/tags/%s/
 boardreader:https://boardreader.com/s/%s.html
 book_google:https://google.com/search?q=%22parent+directory%22+pdf+OR+epub+OR+DjVU+OR+xps+%22%s%22+-html+-htm+-shtml+-phtml+-php+-buy+-aspx+-jsp+-asp+-cgi+-pdf+-ftp+-unknownsecret&num=100&filter=0
+annas-archive:https://annas-archive.org/search?q=
 Note: &#34;Engines&#34; needs file &#34;engine.search&#34;，whose format is same as &#34;home.search&#34; except that the keyword part of url must be denoted with &#34;%s&#34;. Pressing the right arrow button on the search result page will automatically query with next engine in the file.</description>
     </item>
     
diff --git a/en/links/index.html b/en/links/index.html
index 1edeb08..026d942 100644
--- a/en/links/index.html
+++ b/en/links/index.html
@@ -98,10 +98,16 @@ Socks proxy</p>
 </ul>
 <h4 id="commands">commands</h4>
 <ul>
-<li>:p [width in milliInch]x[height] [top margin]:[right margin]:[bottom margin]:[left margin]<br>
+<li>
+<p>:![command line]<br>
+The command line could be a &quot;.js&quot; file as executable with arguments. Ex. &quot;:!s youtube keyword&quot; could invoke &quot;s.js&quot;(if file exists) executable with the whole string as arguments.</p>
+</li>
+<li>
+<p>:p [width in milliInch]x[height] [top margin]:[right margin]:[bottom margin]:[left margin]<br>
 Generate/Print PDF file in the &quot;/sdcard/Download&quot; folder, all units are milliinch.<br>
 Ex. &quot;:p x&quot; or &quot;:px&quot; for screen width and infinite height (as long vector screenshot).<br>
-&quot;:p x[height]&quot; or &quot;:px[height]&quot; for screen width.</li>
+&quot;:p x[height]&quot; or &quot;:px[height]&quot; for screen width.</p>
+</li>
 </ul>
 <h3 id="i-internal-links">&quot;i:&quot; internal links:</h3>
 <ul>
diff --git a/en/search/index.html b/en/search/index.html
index 0fe8d04..346b5e3 100644
--- a/en/search/index.html
+++ b/en/search/index.html
@@ -58,6 +58,7 @@
 <p><a href="i:00Instagram:https://www.instagram.com/explore/tags/%s/">Instagram:https://www.instagram.com/explore/tags/%s/</a></p>
 <p><a href="i:00boardreader:https://boardreader.com/s/%s.html">boardreader:https://boardreader.com/s/%s.html</a></p>
 <p><a href="i:00book_google:https://google.com/search?q=%22parent+directory%22+pdf+OR+epub+OR+DjVU+OR+xps+%22%s%22+-html+-htm+-shtml+-phtml+-php+-buy+-aspx+-jsp+-asp+-cgi+-pdf+-ftp+-unknownsecret&num=100&filter=0">book_google:https://google.com/search?q=%22parent+directory%22+pdf+OR+epub+OR+DjVU+OR+xps+%22%s%22+-html+-htm+-shtml+-phtml+-php+-buy+-aspx+-jsp+-asp+-cgi+-pdf+-ftp+-unknownsecret&amp;num=100&amp;filter=0</a></p>
+<p><a href="i:00annas-archive:https://annas-archive.org/search?q=">annas-archive:https://annas-archive.org/search?q=</a></p>
 <p>Note: "Engines" needs file "engine.search"，whose format is same as "home.search" except that the keyword part of url must be denoted with "%s". Pressing the right arrow button on the search result page will automatically query with next engine in the file.</p>
 <p>Common engines:<br>
 <a href="i:00google:https://google.com/search?q=">google:https://google.com/search?q=</a>
@@ -160,13 +161,18 @@
 <p><a href="i:00pmc:https://www.ncbi.nlm.nih.gov/pmc/?term=">pmc:https://www.ncbi.nlm.nih.gov/pmc/?term=</a></p>
 <p><a href="i:00Tabers:https://www.tabers.com/tabersonline/search?st=OSS&q=">Tabers:https://www.tabers.com/tabersonline/search?st=OSS&amp;q=</a></p>
 <p><a href="i:00medicinenet:https://www.medicinenet.com/%s/definition.htm">medicinenet:https://www.medicinenet.com/%s/definition.htm</a></p>
-<p>Cloud storage:</p>
+<p>Torrent:<br>
+<a href="i:00aio:https://www.aiosearch.com/search/4/Torrents/">aio:https://www.aiosearch.com/search/4/Torrents/</a></p>
+<p><a href="i:00academictorrents:https://academictorrents.com/browse.php?search=">academictorrents:https://academictorrents.com/browse.php?search=</a></p>
+<p><a href="i:00katcr:https://katcr.to/search/">katcr:https://katcr.to/search/</a></p>
 <p>Scholar:<br>
-<a href="i:00base:https://www.base-search.net/Search/Results?lookfor=">base:https://www.base-search.net/Search/Results?lookfor=</a></p>
+<a href="i:00classcentral:https://www.classcentral.com/search?q=">classcentral:https://www.classcentral.com/search?q=</a></p>
+<p><a href="i:00base:https://www.base-search.net/Search/Results?lookfor=">base:https://www.base-search.net/Search/Results?lookfor=</a></p>
 <p><a href="i:00science.gov:POST:fullRecord=%s:https://www.science.gov/scigov/search.html">science.gov:POST:fullRecord=%s:https://www.science.gov/scigov/search.html</a></p>
 <p><a href="i:00sweetsearch:https://sweetsearch.com/search?q=">sweetsearch:https://sweetsearch.com/search?q=</a></p>
 <p><a href="i:00refseek:https://www.refseek.com/search?q=">refseek:https://www.refseek.com/search?q=</a></p>
 <p><a href="i:00google scholar:https://scholar.google.com/scholar?q=">google scholar:https://scholar.google.com/scholar?q=</a></p>
+<p><a href="i:00core:https://core.ac.uk/search?q=">core:https://core.ac.uk/search?q=</a></p>
 <p><a href="i:00semanticscholar:https://www.semanticscholar.org/search?sort=relevance&q=">semanticscholar:https://www.semanticscholar.org/search?sort=relevance&amp;q=</a></p>
 <p><a href="i:00xueshu:https://xueshu.baidu.com/s?wd=">xueshu:https://xueshu.baidu.com/s?wd=</a></p>
 <p>Developer:<br>
diff --git a/en/topposts/index.xml b/en/topposts/index.xml
index af1e76e..a994865 100644
--- a/en/topposts/index.xml
+++ b/en/topposts/index.xml
@@ -43,6 +43,7 @@ Facebook:https://www.facebook.com/search/str/%s/keywords_search
 Instagram:https://www.instagram.com/explore/tags/%s/
 boardreader:https://boardreader.com/s/%s.html
 book_google:https://google.com/search?q=%22parent+directory%22+pdf+OR+epub+OR+DjVU+OR+xps+%22%s%22+-html+-htm+-shtml+-phtml+-php+-buy+-aspx+-jsp+-asp+-cgi+-pdf+-ftp+-unknownsecret&amp;amp;num=100&amp;amp;filter=0
+annas-archive:https://annas-archive.org/search?q=
 Note: &#34;Engines&#34; needs file &#34;engine.search&#34;，whose format is same as &#34;home.search&#34; except that the keyword part of url must be denoted with &#34;%s&#34;. Pressing the right arrow button on the search result page will automatically query with next engine in the file.</description>
     </item>
     
diff --git a/index.html b/index.html
index 33185bf..db7d507 100644
--- a/index.html
+++ b/index.html
@@ -1,10 +1 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <title>en/</title>
-    <link rel="canonical" href="en/">
-    <meta name="robots" content="noindex">
-    <meta charset="utf-8">
-    <meta http-equiv="refresh" content="0; url=en/">
-  </head>
-</html>
+<meta http-equiv="refresh" content="0; url=en/index.html">