Production of hand tools, spirit levels, laser levels, rulers, squares, tape measures, laser line projectors and their accessories, measuring tools and accessories, precision online measuring instruments (digital spirit levels, laser distance meters); sale of self-produced products, and provision of product repair and installation services. Engaged in the wholesale and import/export business of similar products and their accessories as those produced by the company (excluding state-managed trade; for products involving quota or license management, apply according to national regulations). General items: metal tool manufacturing; optical instrument manufacturing; hardware product manufacturing; mold manufacturing; pneumatic and electric tool manufacturing; mechanical parts and components processing; plastic product manufacturing; hand cart and animal-drawn vehicle manufacturing; service consumer robot manufacturing; retail of computer software, hardware, and auxiliary equipment; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion.