diff --git a/accelerated-domains.china.conf b/accelerated-domains.china.conf
index 20c4328e07..27c7242ad2 100644
--- a/accelerated-domains.china.conf
+++ b/accelerated-domains.china.conf
@@ -12259,6 +12259,7 @@ server=/chakahao.com/114.114.114.114
 server=/chakd.com/114.114.114.114
 server=/chakuaizhao.com/114.114.114.114
 server=/chalayout.com/114.114.114.114
+server=/challenge-21c.com/114.114.114.114
 server=/chalwin.com/114.114.114.114
 server=/chamcfae.com/114.114.114.114
 server=/chamei.com/114.114.114.114