Zcash plans to launch the Zcash Posterity Fund to modify the ZEC issuance rules to improve network sustainability, including keeping the total amount of ZEC at 21 million, but the fixed-period halving will be replaced by a smoother production reduction curve; supply during the transition to PoS is guaranteed The key attributes of ZEC and issuance plan are preserved; new features such as Zcash Shielded Assets can adopt a new fee mechanism, which has a good incentive for the sustainability of ZEC. Zcash stated that this improvement scheme is independent of the PoS consensus and can also be implemented under the current PoW consensus.