diff --git a/system-variables.md b/system-variables.md
index 5122cfb03b933..739f713ccefcb 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -2840,16 +2840,12 @@ For a system upgraded to v5.0 from an earlier version, if you have not modified
 
 ### tidb_gc_life_time <span class="version-mark">New in v5.0</span>
 
-> **Note:**
->
-> This variable is read-only for [TiDB Cloud Serverless](https://docs.pingcap.com/tidbcloud/select-cluster-tier#tidb-cloud-serverless).
-
 - Scope: GLOBAL
 - Persists to cluster: Yes
 - Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
 - Type: Duration
 - Default value: `10m0s`
-- Range: `[10m0s, 8760h0m0s]`
+- Range: `[10m0s, 8760h0m0s]` for TiDB Self-Managed and [TiDB Cloud Dedicated](https://docs.pingcap.com/tidbcloud/select-cluster-tier#tidb-cloud-dedicated), `[10m0s, 168h0m0s]` for [TiDB Cloud Serverless](https://docs.pingcap.com/tidbcloud/select-cluster-tier#tidb-cloud-serverless)
 - The time limit during which data is retained for each GC, in the format of Go Duration. When a GC happens, the current time minus this value is the safe point.
 
 > **Note:**