As a decentralized social protocol that once received support from Twitter founder Jack Dorsey with 14 bitcoins, how many people still remember Nostr, which was extremely popular two years ago and was banned from promotion by Twitter during Musk's tenure? Today, Jack Dorsey directly launched a physically enhanced version of Nostr, this time called Bitchat. Previously, Nostr required a network relay, but now Bitchat directly implements point-to-point encrypted communication within physical distance through Bluetooth. Each device can act as a client and can also be used as a relay server to achieve multi pole message forwarding. Similar to the honeycomb principle, a large number of Bluetooth will form a locally communicable cluster, so there will be a large number of local clusters, among which overlapping cluster devices will become relay nodes. Finally, a network topology without a network will be created through Bluetooth devices. At present, both the beta version and white paper have been released. Regardless of the outcome, this is Jack Dorsey.