diff --git a/_config.yml b/_config.yml
index 9def1cd..76f3e35 100644
--- a/_config.yml
+++ b/_config.yml
@@ -18,13 +18,13 @@
 # You can create any custom variable you would like, and they will be accessible
 # in the templates via {{ site.myvariable }}.
 
-title: LatticeMage
-email: latticemage@gmail.com
-url: https://lattice.posetmage.com # the base hostname & protocol for your site, e.g. http://example.com
+title: HomunMage
+email: homun@posetmage.com
+url: https://homun.posetmage.com # the base hostname & protocol for your site, e.g. http://example.com
 
 description: Tools
 baseurl: /Tools # the subpath of your site, e.g. /Tools
-repository: latticemage/Tools
+repository: homun/Tools
 
 exclude:
   - Productivity/Converter/EPUB/book1/
diff --git a/index.md b/index.md
index 5423a43..2a1b3c9 100644
--- a/index.md
+++ b/index.md
@@ -11,3 +11,4 @@ HomunMage Tools for Productivity, Coding, ......
 
 ## [OS](./OS/)
 
+## [System Design Interview](https://SystemDesignInterview.github.io)
\ No newline at end of file