Forming a sophisticated quality management and control system, we persist in Three Combination during construction including combination of sample projects and on-site education and training, combination of early detailed design and on-site measurement as well as setting out of route, combination of finished and semi-finished products and on-site installation. In order to improve quality, we inform our workers of standards and requirements of sample projects, conduct skill competition among various workers. In addition, we conduct self-examination of quality according to Internal Acceptance System, which is stricter than industry standard, establish The Database for Preventing and Curing General Quality Problems, both ensuring the project quality.