Recently, Avalanche Bridge, the native cross-chain bridge of the avalanche protocol Avalanche, announced that about 880 GB tokens will be airdropped to each user's wallet address that has participated in the interaction. After GB enters the secondary market, the highest price will reach 3.68 US dollars. The value also soared to 3238 US dollars. Currently, GB has fallen back to around $1.8. The wealth effect brought about by airdrops has begun to make the market pay attention to the original cross-chain bridge section of the public chain, and the cross-chain agreement itself is also an important tool on the chain. At present, in addition to the veteran blockchain network Ethereum, new-generation public chains such as BSC, Solana, Fantom, and Avalanche have begun to enter the market. The second-tier expansion chains of Ethereum, Aribitrum and Optimism, are not too much, and the coexistence of multiple chains is the current market. Therefore, the interconnection of assets between chains also makes cross-chain agreements a rigid demand for users on the chain. There are currently two main approaches for asset cross-chain: Although cross-chain protocols provide users with the convenience of on-chain interaction, security is still worrying. Due to the increase in demand for transactions on the chain, the scale of cross-chain funds hosted by cross-chain bridges has also become larger and larger, and it has also become the favorite target of hackers, leading to the high incidence of security incidents in cross-chain bridges. Within two months of July and August this year, there were three security incidents in which cross-chain applications were hacked. On July 11, the cross-chain application ChainSwap was hacked due to a smart contract vulnerability, resulting in a loss of approximately US$8 million; On July 12, the decentralized cross-chain transaction application Anyswap v3 cross-chain fund pool was attacked and lost nearly 8 million U.S. dollars; in August, the cross-chain protocol O3 Swap was stolen due to its infrastructure PolyNetwork network security issues and lost assets As much as 610 million US dollars, the scale of theft hit a new high for DeFi applications. Compared with third-party cross-chain applications, public chain native cross-chain bridges are endorsed by their respective public chain security teams and official authorities, and their security is relatively more trusted by users. It is also the preferred cross-chain method for users when assets are cross-chain. At present, each public chain has launched its own cross-chain bridge. And since AvalancheBridge released the airdrop, users began to look forward to the next public chain cross-chain bridge that issued the airdrop. This issue of DeFi Honeycomb will take stock of the native cross-chain bridges of major public chains. BinanceBridge Binance Bridge is the official cross-chain tool of Binance Smart Chain BSC. It currently supports asset interoperability between Binance Smart Chain and the Ethereum network.