Group 1 - The company Steel Research Nack (300797) is involved in the research and application of corrosion protection and extension technologies for offshore platforms and wind power [1] - The technologies and products developed by Qingdao Nack include cathodic protection for marine and soil environments, corrosion assessment and analysis, corrosion monitoring, and stray current management [1] - These technologies are widely applied in various fields such as marine engineering, port terminals, ship platforms, buried pipelines, energy and electricity, petrochemicals, municipal projects, and metallurgy [1]