diff --git a/readme/cy.md b/readme/cy.md
index 38be6cdc..ff44a4ff 100644
--- a/readme/cy.md
+++ b/readme/cy.md
@@ -89,6 +89,7 @@ Mae'r ystorfa hon yn rhestr o wefannau sydd y tu ôl i "The Great Cloudwall", ga
 
 **Mwy o wybodaeth**
 * [Myth Catalog](../subfiles/myth_catalog.md)
+* [How many % of top 1,000 most visited sites(2010) are using Cloudflare today?](../subfiles/google_ad_planner_top_1000_sites.md)
 * [The Great Cloudwall](../pdf/2019-Jeff_Cliff_Book1.txt), [Mr. Jeff Cliff](https://shitposter.club/users/jeffcliff)
   * Dadlwythwch: [PDF](../pdf/2019-The_Great_Cloudwall.pdf), [ePUB](../pdf/2019-Jeff_Cliff_The_Great_Cloudwall.epub)
   * Cafodd yr eLyfr gwreiddiol (ePUB) ei ddileu gan BookRix GmbH oherwydd torri hawlfraint deunydd CC0