Wu said he learned that Twitter co-founder Jack Dorsey announced the launch of "Bitchat", a decentralized chat application based on Bluetooth Mesh network, which supports end-to-end encryption and multi hop relay communication, and realizes offline point-to-point chat without the Internet. This project focuses on a communication experience similar to IRC, emphasizing privacy protection and local message transmission. It has now been launched on TestFlight and open sourced on GitHub. https://www. (wublock123.com)/index.php? m=content&c=index&a=show&catid=6&id=45179