Take MetaMask wallet as the example
Please confirm that the plug-in of MetaMask wallet has been installed in the browser. Download address:https://metamask.io
Open MetaMask, then you can see the default setting of the wallet is Ethereum Mainnet. Click the Ethereum Mainnet, and then click Custom RPC in the drop-down menu.
Fill in the following data in the form:
MetaMask configuration parameters of OKExChain Testnet
Network name：OKExChain Testnet
Block Explorer URL：http://www.oklink.com/okexchain-test
After the connection of wallet configuration and saved, switch to this network.