Production and processing of geotechnical materials (excluding hazardous chemicals); Bentonite waterproof blanket, bentonite waterproof pad, film covered bentonite waterproof blanket, bentonite waterproof board, bentonite waterstop strip, bentonite, Geotextile, geomembrane, composite geomembrane, woven Geotextile, geocell, geogrid, drainage network, geotextile, permeable pipe, plastic blind ditch, geosynthetics, three-dimensional vegetation network, drainage board, corrugated pipe, mining composite false roof net, plastic fence, manhole bag, protective vegetation bag Sales of waterproof rolls, waterproof coatings, exterior wall insulation materials, and fiberglass cloth; Construction of earthwork, civil engineering, and waterproofing and drainage engineering; Self operated and agent import and export of various goods and technologies (excluding import and export of goods under state-owned trade management). (For projects that require approval according to law, business activities can only be carried out with the approval of relevant departments.).