Planning and construction of halls and buildings of all kinds, trade in windows and building materials as well as trade in goods of all kinds. May establish branches and subsidiaries at home and abroad, participate in other companies at home and abroad, conduct all transactions that are directly or indirectly related to its purpose, acquire, encumber, dispose of and manage real estate at home and abroad, provide financing for its own or third-party account, and provide guarantees and bonds for subsidiaries and third parties.