The BNB Beacon Chain will undergo the "Zhang Heng" hard fork upgrade on July 19

ChainCatcher message, BNB Chain announced, "Zhang Heng" upgrade is expected to take place at block height 328,088,888 on July 19. Full node operators on the mainnet must switch their software version to v0.10.16 before July 19.

An important feature change in this upgrade is the introduction of BEP-225, which allows for on-chain asset reconciliation on the BNB Beacon Chain to enhance security. Each block will track changes in user balances and coordinate to identify issues. When a coordination error occurs, the blockchain will stop generating new blocks. (Source link）