"Ya zhi" is the Hangzhou number limited company of science and technology innovation launched for dentists and denture technicians "Internet plus" communication tools. Provide digital products and denture teeth model of 2D and 3D model of real-time view, text, voice and other convenient notation and communication, so that doctors and technicians can break the limits of space and time, communication requirements and customized dentures whenever and wherever possible related problems, to obtain the most satisfactory customized products. "Ya zhi" provides mobile terminals and PC applications.