The stable currency project launched by Facebook, Libra, released version 2.0 of the white paper. This is the largest update since the Libra white paper was released in June last year. It mainly made four key changes in response to the previous regulatory issues with the most resistance: 1. In addition to multi-currency In addition to the stablecoin system, new single-currency stablecoin support is added; 2. Improve the security of the Libra payment system with a robust compliance framework; 3. Abandon the transition to an unlicensed system in the future, while maintaining its main economic attributes; 4. Build stronger protection measures in the design of the Libra reserve.