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 ## Metamask config for BTC
 ```
-Network name: ChainX
+Network name: BEVM
 RPC URL: https://mainnet.chainx.org/rpc
 Chain ID: 1501
 Currency symbol: BTC
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+# ChainXBridge
+
+Through ChainXBridge, assets in BEVM(formerly called `chainx-evm`) and Bitcoin can circulate freely
+
+![chainx-v5](https://github.com/chainx-org/ChainX/assets/8869892/9ba9afdc-c738-4392-8f05-2d9d91d3b3bd)
+
+## 1. Deposit
+
+### 1.1 BTC(bitcoin -> bevm)
+TODO
+
+### 1.2 BRC20(bitcoin -> bevm)
+TODO
+
+### 1.3 PCX(chainx -> bevm)
+ChainX wallet: https://dapp.chainx.org/#/chainstate/extrinsics
+
+xAssetsBridge -> depositPcxToEvm
+
+100000000 means 1 PCX
+
+![deposit-pcx](./deposit-pcx.png)
+
+PCX erc20 address: `0xf3607524cAB05762cB5F0cAb17e4cA3A0F0b4E87`
+
+metamask wallet
+
+![pcx-metamask](./pcx-metamask.png)
+
+### 1.4 XBTC => BTC(chainx -> bevm)
+ChainX wallet: https://dapp.chainx.org/#/chainstate/extrinsics
+
+xAssetsBridge -> swapXbtcToBtc
+
+1000 means 0.00001000 XBTC
+
+![btc-to-evm](./btc-to-evm.png)
+
+### 1.5 BTC(chainx -> bevm)
+ChainX wallet: https://dapp.chainx.org/#/chainstate/extrinsics
+
+xAssetsBridge -> transferBtcToEvm
+
+1000 means 0.00001000 BTC
+
+![transfer-btc-to-evm](./transfer-btc-to-evm.png)
+
+## 2. Withdraw
+
+### 2.1 BTC(bevm -> bitcoin)
+TODO
+
+### 2.2 BRC20(bevm -> bitcoin)
+TODO
+
+### 2.3 PCX(bevm -> chainx)
+ChainXBridge(mainnet): **0xd1543A52d770D32854fc5f5F076a74033D49D41f**
+
+通过remix调用ChainXBridge合约中的**withdrawPCX**
+```solidity
+function withdrawPCX(
+        uint256 value,
+        bytes32 chainxPubkey
+    ) external autoIncreaseNonce returns (bool) {
+        return SystemWithdraw.withdrawPCX(value, chainxPubkey);
+    }
+```
+
+下载ChainX源码,启动remixd
+```bash
+$ git clone https://github.com/chainx-org/ChainX.git
+$ cd ChainX
+$ bash scripts/remix.sh
+```
+
+metamask连接chainx-evm
+![img.png](remix-chainx-bridge.png)
+
+在"At Address": 填入chainx bridge合约地址 **0xd1543A52d770D32854fc5f5F076a74033D49D41f** 
+
+调用 "withdrawPCX": 第一个参数填pcx balance(decimals=8), 第二个参数填chainx账户的公钥
+
+
+chainx账户转公钥可用下面的工具: https://scan.chainx.org/tools/SS58
+![img.png](account-convert.png)
+
+
+## 3. Query balance
+
+### 3.1 BTC(bevm)
+
+![btc-evm](./btc-evm.png)
+
+### 3.2 BTC(wasm)
+
+`0x6CfE5574639Ba46d74b6b67D2651d1470E10BA9a` mapping to `5UKCmTuj5V4wmGnmZYm6RSDbT2mqwf2FUMTJy7phjwmwE51H`
+
+https://evm.chainx.org/tools/SS58
+
+![evm-to-chainx](./evm-to-chainx.png)
+
+https://dapp.chainx.org/#/chainstate/chainstate
+
+![btc-balance](./btc-balance.png)
+
+### 3.3 PCX(bevm)
+
+![pcx-evm](./pcx-evm.png)
+
+### 3.4 PCX(wasm)
+
+https://dapp.chainx.org/#/chainstate/chainstate
+
+![pcx-balance](./pcx-balance.png)
\ No newline at end of file
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