Internet of Things technology, detection technology, network technology services; municipal engineering detection technology development; geological engineering exploration technology development; design, development, and production of multi-dimensional and multi-directional integral glass fiber fabrics; development, production, and sales of in-situ repair materials for underground pipelines; research, development, production, sales, and leasing of professional instruments for municipal detection and geological exploration; import and export of goods and technologies (excluding those prohibited or restricted by the state); sales, leasing, and technical services of special vehicles for underground drainage pipeline detection, dredging, and repair; sales, leasing, and technical services of special equipment and vehicles for sewage treatment, mud-water separation, and dredging; pipeline detection, maintenance, repair engineering and technical services; technical development, technical consulting, technical services, and technology transfer of geographic information systems; network technical services and technical consulting; network engineering design and installation; computer information system integration; surveying and mapping engineering; municipal engineering; structural reinforcement of special engineering; software development; conference and exhibition services; construction quality inspection. (Projects subject to licensing shall be operated only after obtaining relevant department permits.)