Muscat: In the presence of His Majesty Sultan Haitham bin Tarik, the Oman Investment Authority (OIA) signed 23 agreements, memoranda of cooperation,... SHARE Muscat: In the presence of His Majesty Sultan Haitham bin Tarik, the Oman Investment Authority (OIA) signed 23 agreements, memoranda of cooperation, memoranda of understanding and strategic and investment partnerships with Chinese institutions and companies, valued at several billion US dollars.