The dormant Bitcoin of a trillion-dollar scale needs an answer of "becoming more liquid from idle assets". The Bitcoin ecosystem is gradually deriving from richer on-chain structured income scenarios. Building an efficient and secure liquidity network can open up the global imagination space for Bitcoin, a trillion-dollar asset, as a DeFi niche asset. Avalon Labs is the biggest imagination space for Bitcoin liquidity platforms. It has become the largest lending protocol in the entire Bitcoin ecosystem, second only to DAI and lisUSD. Through liquidity design, the stablecoin USDa market is built and fixed-income products are provided to users. Avalon's USDa, through the advantages of the CeDeFi lending platform, allows users to use USDa to obtain USDT from CeFi liquidity providers to solve the peg problem. As Bitcoin assets gradually come out of dormancy, BTCFi is very likely to become a new DeFi asset direction with a volume of hundreds of billions of dollars, and a key tool for building a prosperous ecosystem on the chain.