Implemented stress testing under cross-chain transaction verification and a large number of transactions. The main network economic system design is about to be completed; A step closer into both US and Middle East markets, continue to integrate the layout of globalization.

Mainchain：

Contract — Improve contract upgrade mechanism.

Node — Stop all operations cleanly before the node closes.

Addresses — Refactor aelf addresses to include side-chain ID as well as the aelf prefix.

Consensus — Share the miners’ list to side chains to support merged mining.

Voting — Announce election, vote to candidates, and get the victories automatically.

Proposal — Designed general proposal mechanism for different situations and implemented multi signatures functionality.

Synchronization — Refactored all the logic of synchronization with a finite state machine.

Testing — Transaction execution stress testing, side chain stability testing and performance testing for DPoS, RPC API and Network.