Skid-mounted fueling units, fire-retardant materials, metal containers, steel structures, truss systems, and new building materials, along with general contracting qualifications in construction projects, petrochemical engineering construction, steel structure engineering, building decoration and renovation, mechanical and electrical engineering, anti-corrosion, waterproofing, and thermal insulation, foundation engineering, ancient architecture, and special equipment cleaning for storage tanks. Equipped with hazardous chemical production licenses, fire-retardant material certifications, fire-retardant skid-mounted fueling units, and steel storage tank production certificates and inspection reports.