diff --git a/Cards/Computer Science/OpenWrt部署.md b/Cards/Computer Science/OpenWrt部署.md
index 66722ec3..b8d88e3f 100644
--- a/Cards/Computer Science/OpenWrt部署.md	
+++ b/Cards/Computer Science/OpenWrt部署.md	
@@ -107,7 +107,6 @@ Title: OpenWrt部署
 #### FallBack
 
 - cloudflare-dns.com/dns-query
-- ad.kfdr.top/kefandaoren
 - dns.google/dns-query
 - dns.quad9.net/dns-query
 - doh.opendns.com/dns-query