diff --git a/agora protocol.md b/agora protocol.md
index f58638c79..606863503 100644
--- a/agora protocol.md	
+++ b/agora protocol.md	
@@ -31,9 +31,10 @@
 	- [[2020]] https://docs.google.com/document/d/1JdaC_9J0uYFNFp7g7x4VNtMxJSZQsE2MQkOMmydLCCc/edit#
 	- [[2021]] to learn more: please refer to [[go/agora-slides]] and [[agora]].
 	- [[the agora is a markup convention]]
-- https://twitter.com/flancian/status/1368586813254889475
-- https://twitter.com/flancian/status/1373681988675190785
-- https://twitter.com/flancian/status/1393271063224754184
-- https://twitter.com/flancian/status/1401526897121574916
+- [[twitter]]
+	- https://twitter.com/flancian/status/1368586813254889475
+	- https://twitter.com/flancian/status/1373681988675190785
+	- https://twitter.com/flancian/status/1393271063224754184
+	- https://twitter.com/flancian/status/1401526897121574916