What is the relationship between Zhiyuan oa and writing letters?

The letter was developed by Zhiyuan Internet Company. According to Zhiyuan Internet official website, Zhiyuan Letter is a unified communication platform for corporate office business. As an enterprise instant messaging tool, the biggest difference from other instant messaging tools is the "communication scene". The client supports PC and mobile devices, and accesses the unified communication function at both ends of the server through LAN, VPN and Internet. , including single-person and group communication, online and offline messages such as text, pictures, files and screenshots, file personal data card message recording, real-time synchronization of PC-side and mobile-side messages, and message center integration of collaborative messages. Collaborative messages are pushed to the sending client in real time, and they can be received and viewed without logging in.