The second phase of the Union testnet can be participated, according to the previous experience, the project generally has a second round of testnet, which means that coins will be issued soon, so this is another [short, flat and fast] project. ✅ Reasons to Participate: 🔸 Short cycle: estimated 3 months; 🔸 High expectations: Many people say "don't miss the LayerZero 1300U airdrop 🔸, don't miss Union" 🔸 Strong Background: Has earned a nine-figure TVL commitment ✅A brief analysis of the Union project There are many multi-chain interoperability protocols, for example, LayerZero uses ultra-light node (ULN) + oracle + relayer (Relayer) to separate responsibilities to enhance security, but the modular design may lead to applications choosing insecure oracle/relayer combinations, increasing risks; Wormhole, on the other hand, uses Guardians, which relies on a multi-signature mechanism to lock/mint assets, which simplifies token bridging, but was hacked in 2022 due to a verification vulnerability, resulting in a loss of $325 million. Combined with the advantages and disadvantages of multi-chain interoperability protocols on the market, Union directly verifies cross-chain transactions through the consensus of the direct verification chain based on ZK technology, reducing intermediate links. His core is the "intent-centric" system, focusing on automated cross-chain coordination, not relying on third parties, oracles, multi-signature or MPC (multi-party computation), the liquidity, programmability and security between blockchain networks, and his high modularity can improve the suitability of complex cross-chain scenarios and reduce interaction costs. ✅Ecology supported by Union 🔹LayerZero: The most extensive ecosystem, supporting both EVM and non-EVM chains; 🔹Wormhole: It has significant advantages in the Solana ecosystem, suitable for Solana-EVM bridging and DeFi applications; 🔹Union: Focusing on Bitcoin-related cross-chains (such as LST bridging) and emerging Web3 applications, it has opened up the main chain, L2, Rollup, and Appchain, forming a high-speed infrastructure channel for interoperability between chains; Although it is a new chain, it has established 40+ strategic partnerships and attracted 50+ projects to build on it, including Berachain, Polygon, Celestia, Babylon, Scroll, Sui, Avalanche and other leading blockchain projects; It has completed 50M testnet cross-chain operations, with 250,000 dashboard users and 4,000+ trusted setting contributors. At present, the known news is that Union has received $16 million in financing, obtained nine-figure TVL commitments from top LST such as Bedrock, Lombard, Solv, etc., and jointly built a revenue ecosystem with BTCfi such as Escher (LST), Tower (DEX), and SatLayer (Restaking), so that BTC can truly "earn interest". ✅Summary. Union is more versatile than LayerZero, more secure than Wormhole, and lighter than Axelar. Although it focuses on Bitcoin-related cross-chains, it has already opened up Solidity, Move, Cosmos, Solang, and BitVM, from Ethereum to Solana to Babylon, whether it is from assets to information. In other words, whether it is an airdrop or a secondary market, Union may perform very well.