[BounceBit Permanently Shuts Down Self-Developed Chain Due to Security Vulnerability, Will Relaunch BB on BNB Chain] According to BounceBit's announcement, BounceBit stated that its self-developed BounceBit Chain had an authorization vulnerability in the Evmos protocol layer. Between August 19, 21:02 UTC and August 20, 01:54 UTC, attackers unauthorizedly transferred approximately 286.5 million BB tokens from 9 mainnet accounts. Subsequently, the project team halted block production and froze the on-chain state at 02:36 UTC on August 20.