The registration address of shandong changji engineering installations ltd. Is located on the third floor of the third floor of the xiangang grand market, no. B-1 latitude 05, located in the city's new district of shandong province, where legal persons are represented on general projects: construction of metal doors and windows; sale of digital video surveillance systems; sale of metal structures; retail sale of hardware products; sale of steel bars; sale of construction materials; sale of building decorations; sale of lighting equipment; sale of lamps; sale of light and cable operations; sale of security equipment; wholesale distribution of five gold products; sale of machinery and electrical equipment; sale of electrical equipment; sale of electrical and electrical components; sale of electrical and electrical equipment; sale of electrical equipment in buildings under the law; sale of electrical and electrical equipment under the contract; sale of electrical equipment under the contract; sale of electrical and metal equipment under the contract; sale of electrical equipment under the authority of the law; sale of electrical and electrical equipment under the contract; sale of electrical and electrical equipment under the contract; sale of electrical equipment under the contract; sale of electrical and metal equipment under the contract; sale of electrical equipment under the law. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)