Pipe technology research and development, technical services; steel-plastic composite pipes, coated steel pipes, hot-dip galvanized steel pipes. High-density polyethylene water supply pipes, polyvinyl chloride water supply pipes, high-voltage cable protection plastic pipes, agricultural irrigation pipes and accessories, modified polypropylene cable protection pipes, power conduits, steel strip pipes, corrugated pipes, underfloor heating pipes, fiber optic pipes, grating pipes, irrigation equipment research, production, and sales; import and export of goods or technology (excluding goods or technology import and export prohibited or involving administrative approval). (If the company is required to operate according to laws and regulations, the relevant business operation permits shall be obtained.)