diff --git a/docs/design_docs/root_coordinator_recovery_on_power_failure.md b/docs/design_docs/root_coordinator_recovery_on_power_failure.md
index e519fb44a8..51d46a7d8a 100644
--- a/docs/design_docs/root_coordinator_recovery_on_power_failure.md
+++ b/docs/design_docs/root_coordinator_recovery_on_power_failure.md
@@ -2,11 +2,11 @@
 
 ## 1. Basic idea
 
-1. `RC` (Root Coordinator) reads meta from etcd when it starts.
-2. `RC` needs to store the `position` of the msgstream into etcd every time it consumes the msgstream.
-3. `RC` reads the `position` of msgstream from etcd when it starts up, then it seeks to the specified `position` and re-consumes the msgstream.
+1. `RootCoord` (Root Coordinator) reads meta from etcd when it starts.
+2. `RootCoord` needs to store the `position` of the msgstream into etcd every time it consumes the msgstream.
+3. `RootCoord` reads the `position` of msgstream from etcd when it starts up, then it seeks to the specified `position` and re-consumes the msgstream.
 4. Ensure that all messages from the msgstream are processed in an idempotent fashion, so that repeated consumption of the same message does not cause system inconsistencies.
-5. `RC` registers itself in etcd and finds out if the dependent `DC(Data Coordinator)` and `IC(Index Coordinator)` are online via etcd.
+5. `RootCoord` registers itself in etcd and finds out if the dependent `DataCoord(Data Coordinator)` and `IndexCoord(Index Coordinator)` are online via etcd.
 
 ## 2. Specific tasks