Thank you for choosing "Lansenger - Secure Digital Intelligent Work Platform" as your office application. Lansenger is specially designed for large organizations. It provides functions such as organization address book, instant messaging, video conferences and teleconferences, cloud disk and collaborative files, and also provides rich open interfaces for you to develop your own office applications. Lansenger's self-developed notifications, approvals, questionnaires, conference room reservations, learning centers, attendance kits and other applications can quickly solve the complicated trivialities in organizational management for you and help your organization get back on track quickly. We are well aware of the importance of data to you. As a collaborative work platform that has passed the third-level certification and national secret certification of the Ministry of Public Security of China, Lansenger provides security measures from different dimensions such as system security, data security, business security, service security, national secret applications, zero trust security, etc. Lansenger supports independent private deployment, encrypted storage and transmission, and protects your data security. *Login authentication* - Lansenger supports mobile phone number, email, user name and QR code login, and can also use CA certificate login or other authorized login according to the requirements of the organization. - For data transmission security, organizations may require to connect to intranet services via VPN or zero trust. Lansenger has a built-in VPN for you to choose from. *Instant messaging* - Private chat, group chat, broadcast account, subscription account, intelligent robot, various types of chat to meet your work needs. - Chats Filter, Chat Folders, Later (To-Do), Emoji Reaction, rich efficiency improvement functions make you work swiftly in an orderly fashion.  *Organizational address book* - The organizational structure supports the management of large organizations with millions of people. The rich visibility configuration allows you to easily manage subsidiaries, outsourced employees and partners. - The Notify Me function allows you not to miss any important information, and the Call Identification function allows you to quickly identify your colleague's phone number when he calls without storing it. *Collaborative efficiency* - The calendar function integrates work to be done and meeting arrangements, and the daily itinerary can be seen at a glance. - Video conferences and teleconferences allow you to deal with urgent work at any time in the distance. - My Cloud Disk, Organization Cloud Disk and Group Cloud Disk provide online storage for important work materials. You can also preview and edit documents online without downloading file editing tools separately. *Rich functions* - Personal status and automatic reply functions allow you to stay free from work when you are on vacation. - The function of the badge of honor makes it possible to make the organization's commendation online and paperless. If you encounter any problems in the process of using Lansenger, please contact us by email [email protected] or customer service hotline 4006110220.