So, a friend recently recommended @BrahmaFi's new Swype U card to me. It supports KYC for mainland Chinese users and offers no fees for top-ups. Key to this is its ability to leverage on-chain DeFi collateral to borrow funds for spending, with the remaining balance automatically earning interest.
If you're a longtime Base Chain user, you can use your Aave or Euler positions as collateral for your credit limit.
I naturally chose HyperEVM, as it integrates with @HypurrFi products, offering a wide range of lending and borrowing options and greater flexibility.