NIC (No net interconnection) is a blockchain-based IoT underlying protocol that enables smartphones, in-vehicle devices, and more to connect with each other without using the internet. NIC features an integrated lightweight blockchain node, extended based on the Raiden network, which will enable off-net microtransactions for the first time. Complementing the global internet, NIC is poised to carry substantial local traffic in the future, becoming the most optimized universal connection. The NIC third-party ecosystem will effectively address issues of information security and network congestion.