LBD is a purely decentralized and spontaneous community building social experiment. It can meet the requirements of decentralization, and has better anonymity. At the same time, it supports tamper proof real-time transactions, and can ensure that ordinary POW and master node services benefit at the same time. Committed to building an industrial alliance with cryptocurrency as the medium of circulation and value anchor, utilizing blockchain technology as the underlying technological support to provide maximum convenience services for visually impaired individuals worldwide....