diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index 483b7d2c5d..c7e3beb2ab 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -57,3 +57,5 @@ sierracollege.edu
 sss.edu.bi
 stu.shzu.edu.cn
 mail.wcccd.edu
+ustb.edu.cn
+cumtb.edu.cn