DeepChain TechFlow news, the Bitcoin L2 project B² Network announced that $BTC has been integrated into the Aptos ecosystem, promoting the development of BTCFi in the Move ecosystem. In the collaboration between B² Network, Aptos, and Echo, an innovative product aBTC based on the Move language has been launched. This is a cross-chain liquid Bitcoin token that supports $BTC in a 1:1 ratio. The Echo Bridge allows users to bridge uBTC to Echo in exchange for $APT rewards. Users depositing aBTC can earn an annualized yield of over 10% and additional rewards.