Tunnel engineering refers to the excavation and construction of passages in underground or mountainous areas for transportation, energy, drainage, or municipal pipelines. It covers geological surveying, design, excavation construction, support structures, ventilation and drainage, and safety monitoring. Depending on the construction method, it mainly includes open-cut method, shield method, and mining (drill-and-blast) method. Tunnel engineering plays a key role as critical infrastructure in urban transportation, railway and metro, water conservancy and hydropower, and energy pipeline construction.

Highway engineering refers to the systematic engineering carried out to achieve road transportation, including route design, civil construction, bridge and culvert construction, pavement laying, and the construction of ancillary facilities. It covers route surveying, subgrade earthwork, asphalt or cement pavement laying, bridge and tunnel integration, drainage, and traffic safety facilities. Highway engineering is an important component of modern transportation networks, widely applied in the construction of expressways, national and provincial highways, urban express roads, and rural roads, supporting regional economic development and efficient logistics transportation.

Mining engineering refers to the systematic engineering of exploration, extraction, processing, and safety management of mineral resources. It covers mineral prospecting, mining design, underground or open-pit mining, ore processing, transportation, and environmental and safety management. Mining engineering is a key foundational engineering that ensures the supply of energy, metals, and industrial raw materials, and is widely applied in the development of coal, metallic minerals, non-ferrous minerals, non-metallic minerals, and rare earth resources.

Power construction refers to the full-process engineering of planning, design, construction, and operation & maintenance for power generation, transmission, transformation, and distribution systems. Its core links include power station construction, substation and distribution facility installation, line erection, equipment commissioning, and system operation & maintenance. Power construction is a vital infrastructure engineering that ensures energy supply, supports industrial production, and sustains urban life. It is widely applied in various energy types, including thermal power, hydropower, wind power, photovoltaic, and nuclear power.

Photovoltaic power station construction refers to the systematic engineering that converts solar energy into electrical energy, including site selection and planning, installation of photovoltaic modules and inverters, bracket and wiring construction, grid connection commissioning, and operation and maintenance. Photovoltaic power station construction is an important component of clean energy development, widely applied in scenarios such as ground-mounted photovoltaic power stations, rooftop distributed photovoltaics, and agricultural photovoltaics, contributing to the development of renewable energy and low-carbon transformation.

Petrochemical engineering refers to the systematic engineering of extraction, processing, storage and transportation of petroleum, natural gas, and chemical raw materials, as well as the production of chemical products. Its core links include raw material refining, construction of chemical reaction units, allocation of storage and transportation facilities, installation of process pipelines, and safety and environmental management. Petrochemical engineering is widely applied in the fields of petroleum refining, natural gas processing, chemical production, and fine chemicals. It serves as an important pillar of the energy and chemical industry chain, providing key raw materials and power support for industrial development.

Environmental engineering refers to the engineering system that uses technical means to control, reduce, and manage environmental pollution, achieving resource conservation and ecological protection. Its core content includes wastewater treatment, waste gas treatment, solid waste treatment, soil remediation, and environmental monitoring. Environmental engineering is widely applied in industry, urban infrastructure, and energy projects, serving as a key engineering field to ensure ecological safety, promote sustainable development, and improve environmental quality.

Wind power generation engineering is the systematic engineering that converts wind energy into electrical energy, covering wind farm site selection and planning, wind turbine installation, tower and foundation construction, transmission line construction, grid connection commissioning, and operation & maintenance management. Wind power generation engineering is an important component of renewable energy development, widely applied in the construction of onshore and nearshore wind farms, contributing to the optimization of energy structure and low-carbon development.

Building materials refer to various types of materials used in construction engineering for structural, decorative, and functional purposes, including concrete, steel, bricks and tiles, glass, insulation materials, waterproof materials, and various new green building materials. The selection and application of building materials directly affect the safety, durability, and performance of buildings, serving as an important foundation for construction engineering construction and design.

Coal mining engineering refers to the systematic engineering of exploration, extraction, transportation, and safety management of coal resources. It mainly includes underground mine or open-pit mining, coal mining equipment configuration, coal transportation system construction, ventilation and drainage, and safety monitoring. Coal mining engineering is an important foundation for energy supply, providing key raw materials for industries such as thermal power, steel, and chemicals, while requiring strict safety and environmental management to ensure sustainable production.

Mechanical manufacturing engineering takes mechanical products as its core focus and integrates mechanical design, materials science, processing technology, and automation technology into a comprehensive engineering discipline. It covers product development, process planning, precision machining, assembly and commissioning, and quality control, serving as a fundamental pillar of the equipment manufacturing industry and the broader industrial system. With the rapid development of digital manufacturing, intelligent equipment, and the industrial internet, mechanical manufacturing engineering is accelerating toward high-end, intelligent, and green transformation. It provides critical technical support for industries such as construction machinery, power equipment, rail transit, and new energy equipment, and stands as a core driving force for high-quality development in modern industry.

Thermal power engineering relies on fossil fuels (such as coal and natural gas), converting their chemical energy into thermal energy through combustion, and then successively into mechanical energy and electrical energy. It is a systematic engineering discipline and a core component of national energy infrastructure. It covers the entire lifecycle from project initiation and design to construction and operation and maintenance. The core consists of the three main units—boiler, turbine, and generator—together with auxiliary systems. Characterized by high technical intensity and strong reliability, it provides stable electricity for industrial production and public welfare. At present, it is transitioning toward cleaner, smarter, and low-carbon development, supporting the achievement of the “dual carbon” goals.

Hydropower station construction refers to large-scale comprehensive engineering projects that concentrate and convert the potential and kinetic energy of river water into electrical energy through the construction of dams, reservoirs, diversion systems, and related facilities. Its core lies in water-retaining structures (such as dams) that create a water level difference, enabling flowing water to drive turbines, which in turn rotate generators to produce electricity. The project encompasses hub layout, powerhouse construction, power transmission and transformation systems, as well as ecological protection systems. As a mature renewable and clean energy technology, hydropower stations also undertake multiple functions including power generation, flood control, and water supply, serving as key infrastructure for achieving carbon reduction goals.

Railway construction engineering refers to large-scale comprehensive projects that systematically plan, design, and build permanent railway lines and related facilities for the safe and efficient operation of trains. Its core is the construction of linear infrastructure composed of rails, track beds, bridges, tunnels, and other structural elements, along with the simultaneous development of stations, signaling, and dispatching command systems. The project covers the entire process from survey and design, civil works construction, and track laying to the integration of the “four electrical systems” (communications, signaling, power supply, and electrification). As a national transportation backbone, it is key infrastructure for connecting cities and promoting coordinated regional development, playing a fundamental role in improving logistics efficiency and stimulating economic and social vitality.

As a new type of clean energy, hydrogen energy is regarded as an important component of the future energy system and is being rapidly deployed amid the global energy transition and low-carbon development. The hydrogen energy industry chain covers multiple segments, including hydrogen production, storage, transportation, refueling, and end-use applications. It involves key technological fields such as renewable energy-based hydrogen production, water electrolysis hydrogen production, utilization of industrial by-product hydrogen, and hydrogen fuel cell systems. In terms of application, hydrogen energy has gradually expanded into transportation, power peak shaving, iron and steel metallurgy, chemical alternative fuels, and distributed energy systems. The industry scale and number of demonstration projects continue to grow. With the improvement of infrastructure and the advancement of domestic manufacturing capabilities for core equipment, hydrogen energy is moving from the demonstration stage toward large-scale development.

Municipal engineering is a vital component of urban infrastructure construction, covering urban roads, bridges and tunnels, water supply and drainage systems, gas pipeline networks, district heating projects, urban lighting, landscaping, utility tunnels, sponge city development, and other related fields. Municipal engineering construction is directly linked to urban operational efficiency and residents’ quality of life, serving as a key foundation for urban modernization and smart city development.

Energy transportation is a key segment of the energy industry chain, mainly involving the transmission and allocation engineering of energy resources such as oil, natural gas, coal, electricity, and hydrogen. It includes long-distance pipeline engineering, oil and gas storage and transportation engineering, power transmission and transformation engineering, energy port loading and unloading systems, coal conveying systems, and new energy transmission corridor construction. With the transformation of the energy structure and increasing demand for cross-regional energy allocation, energy transportation plays an important role in ensuring national energy security and improving energy utilization efficiency. Particularly in areas such as long-distance oil and gas pipeline networks, cross-regional power grid transmission projects, and outbound transmission projects for large-scale renewable energy bases, project scale and technical requirements continue to rise.

Wireless communication is an important component of modern information infrastructure and is widely applied in mobile communication networks, Internet of Things systems, industrial automation, smart cities, energy monitoring, and emergency communication. With the continuous development of 5G, satellite communication, and low-power wide-area network technologies, wireless communication is accelerating toward higher speed, lower latency, and massive connectivity. Wireless communication systems cover multiple segments, including base station construction, communication antennas, radio frequency equipment, wireless transmission modules, and industrial wireless network solutions, playing a critical supporting role in industrial engineering, municipal construction, energy projects, and transportation systems.

What Is a Solar Energy Storage System?A solar energy storage system is an energy system that combines photovoltaic power generation with energy storage equipment. It usually consists of PV modules, inverters, energy storage batteries, a battery management system, an energy management system, and power distribution equipment. The system can store excess electricity when sunlight is sufficient and release it at night, during cloudy or rainy weather, or during peak power demand periods. This helps improve the utilization rate of photovoltaic power, reduce electricity costs, and enhance power supply stability. Solar energy storage systems are widely used in industrial and commercial parks, residential buildings, off-grid areas, microgrids, power station supporting facilities, communication base stations, agricultural facilities, and emergency power supply scenarios. They are an important technical path for renewable energy consumption, green electricity use, and energy independence.

Transportation and Logistics is a critical infrastructure sector that supports global trade, industrial development, and economic connectivity. It covers a wide range of fields, including road transportation, railways, maritime shipping, aviation, ports, warehousing, supply chain management, intelligent logistics, and transportation equipment manufacturing.The industry involves various types of equipment, technologies, and services, including trucks, railway equipment, ships, aircraft, port machinery, logistics automation equipment, cold chain systems, warehouse solutions, and supply chain management services. Infrastructure construction, equipment innovation, and digital integration have become key factors driving the future development of global transportation networks.