Shinhan Card has started a payment trial for 28 million users that uses Solana and $SOL, according to CoinDesk via CoinTurk News.
The report says the pilot focuses on stablecoin payments and puts real-world transactions on the Solana blockchain. That means users participate in actual payment flows rather than a purely simulated environment.
Beyond the scale and the target network, the provided source text does not include details on which stablecoin(s) will be used, how long the trial runs, or what percentage of payments will route through Solana.