BJK News reports that on December 25, Caixin published an article titled "The Secrets and Deadly Risks of the U Card Craze on Xiaohongshu". The article points out that users can use bank cards bearing the Visa logo to make payments for subscriptions like ChatGPT Plus, with the charges processed through USDT in a cryptocurrency wallet. This type of foreign bank card is commonly referred to as a "U Card" and is a foreign bank card based on US dollar stablecoins. The Caixin article also notes that there are additional legal risks associated with issuing and using U Cards domestically. Whether this is a fleeting transitional product or holds the key to the future payment landscape remains to be seen.