The payment public chain Tempo, jointly launched by Stripe and Paradigm, has officially opened its testnet to the public. Tempo focuses on stablecoin and cross-border payment scenarios, supports direct payment of gas fees with stablecoins, and has dedicated payment channels to ensure low fees and transaction stability. The project has already attracted participation from institutions such as OpenAI, Shopify, Visa, Mastercard, UBS, and Klarna. Klarna plans to issue the stablecoin KlarnaUSD on Tempo next year. Industry insiders believe that Tempo will directly compete with Circle's payment public chain Arc, whose testnet has already attracted participation from Visa, BlackRock, and GS. (Decrypt)