diff --git a/README.md b/README.md
index c699c8c..ebdbc23 100644
--- a/README.md
+++ b/README.md
@@ -19,28 +19,27 @@ yarn install-mac
 # Git3 URI Protocol
 
 ```
-git3://[sender_wallet]@[contract_address or NS]:[chain_id]/<repo_name>
+git3://[sender_wallet]@[hub_contract_address or NS]:[chain_id]/<repo_name>
 ```
 
-
 - [sender_wallet] Optional, address/NS or local wallet name, the default value is `default`.
-- [contract_address or NS] Optional, the default value is `git3.w3q`, that's git3 on ETHStorage official contract.
+- [hub_contract_address or NS] Optional, the default value is `git3.w3q`, that's `git3 official hub contract` on ETHStorage .
 - [chain_id] Optional, chain_id will follow the chain where NS by default, overrides if chain_id is specified
 - <repo_name> Required, your repo name
 
 ## Example:
 - `git3://helloworld`  
-select `default` wallet, git3 official contract address, on ETHStorage chainId: 3334, repo name is `helloworld`
+select `default` wallet, `git3 official hub contract` address, on ETHStorage chainId: 3334, repo name is `helloworld`
 It's equl to `git3://default@git3.w3q:3334/helloworld`
 
-- `git3://myname.eth@git3.w3q/helloworld`  
-select `myname.eth` wallet, `git3.w3q` contract address, on ETHStorage chainId: 3334, repo name is `helloworld`
+- `git3://myname.eth@git3hub.eth/helloworld`  
+select `myname.eth` wallet, `git3hub.eth` hub contract address, on ETH Mainnet chainId: 1, repo name is `helloworld`
 
-- `git3://your_git3.eth:137/helloworld`  
-select `default` wallet, `your_git3.eth` contract address, on Polygon chainId: 137, repo name is `helloworld`
+- `git3://your_git3_hub.eth:137/helloworld`  
+select `default` wallet, `your_git3_hub.eth` hub contract address, on Polygon chainId: 137, repo name is `helloworld`
 
-- `git3://0x0068bD3ec8D16402690C1Eddff06ACb913A209ef:1/helloworld`  
-select `default` wallet, `0x0068...9ef` contract address, on ETH chainId: 1, repo name is `helloworld`
+- `git3://0x0068bD3ec8D16402690C1Eddff06ACb913A209ef:56/helloworld`  
+select `default` wallet, `0x0068...9ef` hub contract address, on BSC chainId: 56, repo name is `helloworld`