The Office Kit is a cross-platform system built around user data, aiming to achieve cross-device collaboration and cross-end data synchronization. It realizes multi-terminal collaboration through pure software solutions, allowing the connection with five terminals and breaking through ecological barriers. It supports the interconnection between Android and MacOS, which is the industry-first. Taking advantage of the large screen, the PC version integrates the user experience of mobile office apps, offering multi-view and multi-window immersive experiences. The upgraded 5.0 framework features card-based components for a more intuitive display of key information, combined with an added dark mode interface, adapting to diverse usage scenarios. Moreover, the multi-terminal consistent visual designs convey a unified OS brand recognition, delivering an efficient and convenient office experience.