Purchase and sale, acquisition, disposal, rental and management of real estate, project planning, construction planning and construction management, construction management and general consulting in the construction industry, realization of real estate projects, renovation and renovation of real estate or real estate shares at home and abroad, participations, establishment of branch offices and subsidiaries, acquisition of patents and licenses of all kinds, participation in other domestic and foreign companies or takeovers, financing for own or third-party account, as well as guarantees and sureties for subsidiaries and third parties, trade with and transport and sale of goods of all kinds at home and abroad, as well as import and export of building materials of all kinds.