diff --git a/index.html b/index.html
index f9d0afb..567442f 100644
--- a/index.html
+++ b/index.html
@@ -33,7 +33,7 @@
 (<font color=#c6a0f6>let</font> ((blog <strong>"<a href=https://dongdigua.github.io/posts>posts/</a>"</strong>)
       (collections "<a href=https://dongdigua.github.io/internet_collections>MagicalIndex</a>")
       (feed "<a href=https://dongdigua.github.io/feed.xml>feed.xml</a>")
-      (mai1 "<span title="probably use gnunet for secure & anonymous chat">dongdigua{a+}outlook{d0t}com</span>")
+      (mai1 "dongdigua(砹)outlook(碘)com")
       (github "<a href=https://github.com/dongdigua>@dongdigua</a>") <a href=https://github.com/dongdigua/dongdigua.github.io><img src=https://github.com/dongdigua/dongdigua.github.io/actions/workflows/site.yml/badge.svg alt="CI status"></a>
       (bilibili "<a href=https://space.bilibili.com/489732092>董地瓜</a>")
       (payment "<a href=https://dongdigua.github.io/xmr>Monero</a>")
diff --git a/js/random-quote.js b/js/random-quote.js
index aa1ebf7..40f813a 100644
--- a/js/random-quote.js
+++ b/js/random-quote.js
@@ -38,6 +38,7 @@ var data = [
     "Emacs has Evil, but Vim doesn't have Magit",
     "免费服务的代价就是你自己",
     "<a id=quote href=https://www.openbsd.org/lyrics.html#62> The only change that was required was a three-line diff</a>",
+    "<a id=quote href=https://www.gnu.org/music/free-software-song.en.html>GNU SLASH MUZIC</a>",
 ];
 
 var index = Math.floor((Math.random() * data.length));
diff --git a/org/ideas.org b/org/ideas.org
index 99f2162..0d8ac17 100644
--- a/org/ideas.org
+++ b/org/ideas.org
@@ -23,3 +23,11 @@ just a [[https://support.microsoft.com/en-us/windows/windows-7-support-ended-on-
 like: https://github.com/tsoding/seroost
 (tsoding twitch 2023.2.1~)
 for searching through blogs I collected
+* on-usb UNIX system with raspi
+connect it with usb shell
+* Distributed & Standardlized Web Archive
+There are web archivers like archive.org, but it just can't consider every page.
+What if everyone archive on their own like, and join a distributed network.
+You want to archive some page, then just store it on your machine, then others can get it.
+*But the problem is: how can I trust you, how can I know if your page is real*
+* 《中学计算机课外实践简要读本》
diff --git a/org/internet_collections.org b/org/internet_collections.org
index f63e4b5..00f6b27 100644
--- a/org/internet_collections.org
+++ b/org/internet_collections.org
@@ -258,6 +258,8 @@ very beautiful page
 *** [[https://www.a1k0n.net/2011/07/20/donut-math.html][donut.c]]
 ** [[https://prithu.dev][prithu.dev]]
 ** [[https://awesomekling.github.io][Andreas Kling (SerenityOS)]]
+** [[https://blog.codingnow.com][云风的 BLOG]]
+*** [[https://blog.codingnow.com/2012/07/c_coroutine.html][C 的 coroutine 库]]
 
 ** B/HWS/fri3nds
 *** [[https://shakaianee.top/][社会易姐]]
@@ -382,6 +384,7 @@ inspiration: Veritasium
 *** [[https://youtu.be/nZudFif409M][Gentoo Linux on a 133Mhz Pentium!]]
 *** [[https://youtu.be/MnJh1xJ7rDY][lisp on arduino (Tuesday Streams)]]
 *** [[https://youtu.be/QaLvtNpoc5o][RubyKaigi 2015: JIT]]
+*** [[https://youtu.be/1EIpek60rs0][DT: Linux Has Become Complicated And Limiting]]
 
 **  [[https://www.youtube.com/@Computerphile][<C>]]
 *** [[https://youtu.be/BAo5C2qbLq8][Network Time Protocol (NTP)]]