Wu said that Ethereum founder Vitalik tweeted that synchronous atomic composability has been over-exaggerated. (Synchronous atomic composability means that when transactions or operations are conducted between different blockchains or L2s, all operations can be completed simultaneously (synchronously), and either all succeed or all fail (atomicity), leaving no partial success or partial failure.) Vitalik gave two common cross-L2 usage scenarios and emphasized that these problems are not technical problems that can be solved by solving synchronization, but can be solved by improving user experience. He suggested adopting the ERC-3770 standard to include chain information in the address, and simplifying the cross-L2 transfer process through the ERC-7683 cross-chain exchange protocol and wallet integration.