The registration address of the ishikoshi family is located 50 metres north-east of the indigo trade street and garden road intersection in hebei province. The registration authority is the indigo district market supervisory authority, with representatives of legal persons and general projects including: sales of doors and windows; installation of indoor wooden windows and windows; sale of architectural and decoration materials; furniture installation and maintenance services; construction of metal doors and windows; sale of wood products. (in addition to the legally approved projects, the operation is carried out on an autonomous basis under a licence)