diff --git a/docs/en/21-tdinternal/01-arch.md b/docs/en/21-tdinternal/01-arch.md
index e72a322d71..6622ee525a 100644
--- a/docs/en/21-tdinternal/01-arch.md
+++ b/docs/en/21-tdinternal/01-arch.md
@@ -126,7 +126,7 @@ TDengine utilizes RAFT protocol to replicate data. If a database has N replicas,
Leader Vnode uses a writing process as follows:
-
+
Figure 3: TDengine Leader writing process
@@ -141,7 +141,7 @@ Leader Vnode uses a writing process as follows:
For a follower vnode, the write process as follows:
-
+
Figure 4: TDengine Follower Writing Process
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