Beijing YJK Building Software Co.,Ltd. engages in the development, sale, and technical services of building structure design and BIM-related software products in China. The company offers basic technology and general software products, including 3D graphics platform, general BIM platform, 2D CAD, and other products; building structure design software, consisting of building structure calculation, masonry structure design, foundation design, building structure construction drawing design and corresponding AutoCAD versions, steel structure construction drawing design, American, European and English versions of structural design and construction drawing, seismic identification and reinforcement design, seismic structure design software products, etc.; and BIM design and collaboration for all disciplines of architecture solutions comprising green building energy-saving design, green building carbon emission calculation, green building indoor and outdoor sound environment design, green building indoor and outdoor air quality design, green building lighting design, green building indoor ventilation design, green building evaluation software, and other software products. It offers mechanical simulation and special structures, construction, and bridge BIM software products, as well as provides online teaching and training system services for architectural structure design, BIM modeling, and prefabricated design curriculums.