Little Bitcoin is a shared smart contract application space developed based on blockchain technology. It is built by a professional encrypted digital currency research and development team jointly formed by senior experts in the Bitcoin community, cryptography researchers, and professional programmers. The application space sets the total amount of small bitcoins to 21 million to measure and issue, no central control node, efficient and convenient, and global payment. She has inherited the point-to-point electronic cash system of Bitcoin's wisdom crystallization, the essence of Ethereum's smart contract system, and a shared smart contract application space integrating the core of the shared industry ecology.