diff --git a/_config.yml b/_config.yml
index 273a5bf803d..11ad4ad6acd 100644
--- a/_config.yml
+++ b/_config.yml
@@ -12,7 +12,7 @@ repository               : "nanmengyu/nanmengyu-homepage.github.io"
 google_scholar_stats_use_cdn : true
 
 # google analytics
-google_analytics_id      :  G-CQ1VYGG23F
+google_analytics_id      : G-CQ1VYGG23F # get google_analytics_id from https://analytics.google.com/analytics/
 
 # SEO Related
 google_site_verification :   get google_site_verification from https://search.google.com/search-console/about