diff --git a/v3/public-resolvers.md b/v3/public-resolvers.md
index 3038e253..cde4bd07 100644
--- a/v3/public-resolvers.md
+++ b/v3/public-resolvers.md
@@ -2138,7 +2138,7 @@ sdns://AgUAAAAAAAAAAKDMEGDTnIMptitvvH0NbfkwmGm5gefmOS1c2PpAj02A5iBETr1nu4P4gHs5I
 
 ## tuna-doh-ipv4
 
-DoH server provided by Tsinghua University TUNA Association, located in China, no GFW poisoning yet it has a manual blacklist.
+DoH server provided by Tsinghua University TUNA Association, located in mainland China, no GFW poisoning yet it has a manual blacklist.
 
 sdns://AgEAAAAAAAAAIGh0dHBzOi8vMTAxLjYuNi42Ojg0NDMvZG5zLXF1ZXJ5AAAKL2Rucy1xdWVyeQ