The registration authority is the market supervision authority of the city of dunchou, with the legal personality li yaming as its registered address in the white goose cemetery village at the yongfon road street office in yunchou city. The legal entity is represented by li yaming and operates on general items: manufacturing of doors and windows; sale of doors and windows; manufacture of hardware products; sale of metal materials; construction of metal doors and windows; sale of metal products; sale of construction materials; engineering management services; rental of machinery and equipment; installation of indoor wooden doors and windows (run autonomously on the basis of a business licence, except for projects that require authorization under the law)