The more reliable ones are Weikang, Devil, PhaseSpace, Optitrack and Tianyuan. If Vicon can't reach it, the Phasespace active dynamic capture system is also more difficult, with similar cost and high cost. The process, interface and packaging of Optitrack motion capture system are all international standards, but the data jitter is obvious and easy to jump, and the post-processing data cleaning is troublesome, and the capture quality and motion effect are average. Beijing Tianyuan motion capture system is practical, characterized by a passive system with new intelligent algorithm, clean data, good real-time data quality, simple post-processing and good motion restoration, but the product system is relatively simple and lacks high-end products (high frame rate above 100fps and high resolution above 4 million pixels). If you use a large space (above 15m× 6550), the most important thing is to make more field trips, do some representative quick and complicated actions, see the effect of real-time capture demonstration on the spot, and see the quality of data binding animation before making a decision.