Odaily News UniSat founder and CEO Lorenzo said on the X platform that rapid progress has been made in the implementation of smart contracts and cross-chain bridges. In terms of smart contracts, Fractal launched OP_CAT in the testnet reset today and plans to activate it on the mainnet from September 1. Regarding cross-chain bridges, 3 to 5 methods are being developed to transfer assets from the Bitcoin mainnet to Fractal. And said there is a strong developer program aimed at promoting the practical application of Bitcoin expansion. In the next few years, the Bitcoin system has four pillars: compatibility, composability, parallelism and scalability. Fractal is strengthening these four aspects in different ways. Compatibility: BRC-20, RUNE and some other Bitcoin protocols will be natively supported, and a modular approach will be adopted to enable them to interoperate and be compatible with Bitcoin; Composability: Advanced Bitcoin virtual machines will be gradually enabled to build modern applications within TapRoot (so that compatibility can be maintained at the blockchain level). We also tried an off-chain execution model, brc20-swap (which may become Fractal Swap or PizzaSwap in the future); Parallelism: The UTXO model with stateful transaction chains (tx-chains) enables the provision of locally executed services without interfering with other services, resulting in extremely high localization and efficiency without worrying about global state; Scalability: Think of the Bitcoin blockchain as the backbone of a new system that requires thousands of Fractal instances to be built around it. Bitcoin as a blockchain only needs to exist. The scalability of the entire system is the key.