diff --git a/docs/announce/second-sunset-bc.md b/docs/announce/second-sunset-bc.md
new file mode 100644
index 0000000000..cbad9b2859
--- /dev/null
+++ b/docs/announce/second-sunset-bc.md
@@ -0,0 +1,43 @@
+# Second Sunset Hardfork of BC
+
+
+ Hardfork
+
+
+## Upgrade Timeline
+
+The Second Sunset Hardfork will happen at:
+
+- Mainnet: July 14 2024 6:00:00 AM UTC
+
+## Upgrade to BC Node v0.10.22 Before Hardfork
+
+BC node need to be upgraded before the hardfork time.
+
+- https://github.com/bnb-chain/node/releases/tag/v0.10.22
+
+### Upgrade Instructions
+
+As a fullnode runner, you need to take the following steps before the hardfork block height.
+
+1) Download the new v0.10.22 binary and replace the previous version.
+
+2) Download the new config
+ file [app.toml](https://github.com/bnb-chain/node/releases/download/v0.10.22/mainnet_config.zip) to replace the
+ previous version or add the following under the [upgrade] module of `app.toml`.
+
+```toml
+SecondSunsetHeight = 378062790
+```
+
+3) Stop the bnbchaind process and restart it with v0.10.22.
+
+```shell
+service bnbchaind restart
+```
+
+## Key Highlight
+
+All TimeLocks and AtomicSwaps on BC tesnet will automatically be refunded to user accounts.
+All the BSC delegations will be automatically undelegated and refunded to user accounts after the unbonding period.
+For more information about BNB Chain Fusion, please refer to [this](https://www.bnbchain.org/en/bnb-chain-fusion).
\ No newline at end of file
diff --git a/mkdocs.yml b/mkdocs.yml
index 8edceabd85..724aa622bd 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -62,13 +62,14 @@ nav:
- Announcements:
- Announcements: ./announce/index.md
- Upcoming:
- - Haber Hardfork(BSC): ./announce/haber-bsc.md
- - Haber Hardfork(opBNB): ./announce/haber-opbnb.md
- - Second Sunset Hardfork(BC testnet): ./announce/second-sunset-bc-testnet.md
- Veld Hardfork(Greenfield): ./announce/veld-greenfield.md
+ - Second Sunset Hardfork(BC): ./announce/second-sunset-bc.md
- Passed:
- Feynman Hardfork(BSC): ./announce/feynman-bsc.md
- Erdos Hardfork(Greenfield): ./announce/erdos-greenfield.md
+ - Haber Hardfork(BSC): ./announce/haber-bsc.md
+ - Haber Hardfork(opBNB): ./announce/haber-opbnb.md
+ - Second Sunset Hardfork(BC testnet): ./announce/second-sunset-bc-testnet.md
- BNB Chain Fusion:
- BNB Chain Fusion: ./bc-fusion/index.md