The registration address of the company is 200 metres north of the village of suttsun, the neighbourhood of yishan, yishan county, and the registration authority is wu haiyan, the market supervision authority, which operates on general projects: sale of metal products; manufacturing of doors and windows; construction of metal doors and windows; construction of metal structures; sale of doors and windows; installation of indoor wood doors and windows; sale of metal structures. (in addition to the projects that require authorization under the law, the construction of construction works; professional construction work; and subcontracting of construction services. (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)