diff --git a/hws/07_search_engine/README.md b/hws/07_search_engine/README.md
index 3cb8acd..5a527d2 100644
--- a/hws/07_search_engine/README.md
+++ b/hws/07_search_engine/README.md
@@ -343,7 +343,7 @@ You must do this assignment on your own, as described in the [Collaboration Poli
 
 ## Instructor's Code
 
-You can test (but not view) the instructor's code here: [instructor code](http://cs.rpi.edu/~xiaoj8/ds/search/).
+You can test (but not view) the instructor's code here: [instructor code](http://cs.rpi.edu/~xiaoj8/ds/search/). Note that this page just uses a copy of Google's homepage to serve as the front end, and at the back end it runs the instructor's C++ code.
 
 ## Rubric