According to Odaily Planet Daily, BNB Chain posted on social media that the opBNB test network nodes must be upgraded to the latest version before the fork on May 15. This upgrade will reduce the Gas fee of the opBNB test network by 10 times. The opBNB team reminded that all test network nodes must be upgraded to the latest version before 06:00 UTC on May 15. In addition, this upgrade also includes the transition of DA data from calldata to blob format, as well as changes to multiple op-node configurations. Earlier news, opBNB released version v0.4.0, announcing that it will carry out four hard fork upgrades on the test network from 06:00-06:30 UTC on May 15, including Snow, Shanghai/Canyon, Delta, and Cancun/Ecotone.