"Lingchi Play Ink" is an APP that aims at Chinese character education and cultural dissemination, has both Chinese character calligraphy teaching, free creation, entertainment and social functions, and continuously attracts users with game elements. APP creatively restores the real Chinese calligraphy creation process, the exquisite four treasures model of the study, the rigorous and powerful Chinese calligraphy teaching system, the moving story process, and the excellent art style. It also combines ML and AR technology with application functions, which is both instructive, entertaining and artistic. Let users know beauty, love beauty and create beauty in the process of use. The work has the following characteristics 1. In terms of mechanism and play, the design idea of "calligraphy fun to be true" is the core. APP original pseudo-real hand calligraphy teaching, make full use of AR features to help users fully and intuitively understand the details of calligraphy. APP innovatively displays complex Chinese calligraphy writing tools one by one in a virtual form, attracting users to be interested in calligraphy art and Chinese character culture. The creation of calligraphy not only retains the basic elements of calligraphy, but also simplifies the operation process and lowers the learning threshold, so that people who are not good at calligraphy and do not have the right time and venue can easily get started. Keep the social attributes of calligraphy works and punch cards in different locations. 2. Technically, actively use AR and deep learning technology APP combines AR technology with the entertainment function and teaching function of application, breaking the boundary between virtual and reality and making APP quite interesting. Actively explore the use of in-depth learning and image recognition technology, design and build a teaching system, and combine the teaching function with the level playing method and the design function, so that users can write well happily and learn calligraphy at any time and place. 3. Culturally, on the premise of respecting history, the images and materials of calligraphy knowledge, four treasures of the study, famous tablets and famous posts, and calligraphy masters are carefully presented in APP, and efforts are made to popularize the knowledge of calligraphy and Chinese characters and promote Chinese culture. 4. Aesthetic performance combines the national style of ink painting with modern aesthetics APP carries out innovative audio-visual design to enable users to accept the influence of calligraphy and Chinese character culture in an immersive experience.