So I sent him the transaction hash, showing that the transfer has been successful.
When he sent me the screenshot, I guessed that he was checking the balance on the eth chain.
So I taught him how to add other chains to metamask. I think there may be other people who need this part of the knowledge, so I wrote this topic.
If you use metamask for the first time, you will find that there are 5 initial chains, 1 eth mainnet, and 5 eth testnets.
I used the search function and found this information about metamask：
how to add tokens in MetaMask：https://bitcointalksearch.org/topic/how-to-add-tokens-in-metamask-4956547
[Guide] How to Install MetaMask for Chrome：https://bitcointalksearch.org/topic/guide-how-to-install-metamask-for-chrome-3754513
Below I will show you how to add other chains.For example, bsc chain, heco chain, ok chain, matic chain, ftm chain.
1：click custom RPC
2：Follow the 3 step to fill in the information of various chains
3：Various chains
BSC mainnet
NetWork Name: BSC
RPC URL：https://bsc-dataseed.binance.org/
ID：56
Currency Symbol：BNB
URL：https://www.bscscan.com/
OKExChain mainnet
NetWork Name: OKExChain Mainnet
RPC URL:https://exchainrpc.okex.org
ID: 66
Currency Symbol ：OKT
Block Explorer URL: https://www.oklink.com/okexchain/
Heco mainnet
NetWork Name: Heco Testnet
RPC URL：https://http-mainnet.hecochain.com
ID：128
Currency Symbol：HT
Block Explorer URL：https://scan.hecochain.com
Matic mainnet
NetWork Name：matic mainnet
RPC URL：https://rpc-mainnet.maticvigil.com/
ID：137
Currency Symbol：MATIC
Block Explorer URL：https://explorer.matic.network/
xDai
NetWork Name: xDai
PRC URL ：https://rpc.xdaichain.com/
ID:100
Currency Symbol:xDai
Block Explorer URL：https://blockscout.com/poa/xdai
Optimistic Ethereum mainnet
NetWork Name: Optimistic Ethereum
RPC URL: https://mainnet.optimism.io
ID: 10
Currency Symbol: ETH
Block Explorer URL: https://mainnet-l2-explorer.surge.sh
Avalanche mainnet
Network Name: Avalanche Mainnet C-Chain
RPC URL: https://api.avax.network/ext/bc/C/rpc
ID: 43114
Currency Symbol: AVAX
Block Explorer URL: https://cchain.explorer.avax.network/
FTM mainnet
NetWork Name：Fantom Opera
RPC URL：https://rpcapi.fantom.network
ID：250
Currency Symbol：FTM
Block Explorer URL：https://ftmscan.com
Please refer to the official website for all information
The above information comes from the official website of each project：
bsc：https://docs.binance.org/smart-chain/developer/rpc.html
okex chain：https://okexchain-docs.readthedocs.io/en/latest/developers/quick-start-for-mainnet.html
heco chain：https://docs.hecochain.com/#/mainnet
avax chain：https://docs.avax.network/build/tutorials/smart-contracts/deploy-a-smart-contract-on-avalanche-using-remix-and-metamask
FTM chain：https://docs.fantom.foundation/tutorials/set-up-metamask
xDAI chain：https://www.xdaichain.com/for-developers/developer-resources#json-rpc-endpoints
Optimistic chain：https://community.optimism.io/docs/users/metamask.html#frontmatter-title
Different chains are not interoperable under normal circumstances. A dapp on a certain chain must first link the metamask to this chain before continuing to use the dapp.
Reserved to update applications and projects on each chain.