From 76a2e9a0f990a7e960afe44ba5be1ccfee8f4c2a Mon Sep 17 00:00:00 2001
From: TomShawn <1135243111@qq.com>
Date: Fri, 17 Apr 2020 12:22:17 +0800
Subject: [PATCH 1/2] tiflash: add warning to upgrade from pre-rc version

---
 reference/tiflash/upgrade.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/reference/tiflash/upgrade.md b/reference/tiflash/upgrade.md
index 603548f94577f..4611f1f873921 100644
--- a/reference/tiflash/upgrade.md
+++ b/reference/tiflash/upgrade.md
@@ -6,6 +6,10 @@ category: reference
 
 # Upgrade TiFlash Nodes
 
+> **Note:**
+>
+> To upgrade from the TiFlash Pre-RC version to a later version, contact [PingCAP](mailto:info@pingcap.com) for more information and help.
+
 Before the upgrade, make sure that the cluster is started. To upgrade TiFlash nodes, take the following steps:
 
 1. Run the upgrade command:

From 2b0c8c3afb7da0787568af1eadf705c76fbecd26 Mon Sep 17 00:00:00 2001
From: Keke Yi <40977455+yikeke@users.noreply.github.com>
Date: Fri, 17 Apr 2020 17:32:20 +0800
Subject: [PATCH 2/2] Update reference/tiflash/upgrade.md

---
 reference/tiflash/upgrade.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reference/tiflash/upgrade.md b/reference/tiflash/upgrade.md
index 4611f1f873921..e8dbc4be8c3fe 100644
--- a/reference/tiflash/upgrade.md
+++ b/reference/tiflash/upgrade.md
@@ -8,7 +8,7 @@ category: reference
 
 > **Note:**
 >
-> To upgrade from the TiFlash Pre-RC version to a later version, contact [PingCAP](mailto:info@pingcap.com) for more information and help.
+> To upgrade TiFlash from the Pre-RC version to a later version, contact [PingCAP](mailto:info@pingcap.com) for more information and help.
 
 Before the upgrade, make sure that the cluster is started. To upgrade TiFlash nodes, take the following steps: